It's "funny". Almost all guys who try to hit on girls get rejected, either right off the bat or after a brief period of dating when things don't work out. This happens especially often when people are first starting out and don't have a lot of experience. (Yes, there are the exceptions who spend their entire lives happily married to their first high school sweetheart, but they are very rare.) And yet not all of them end up deciding that women in general are horrible.
Some guys get rejected and blame it on fate or chance or some other random factor and try again. In essence they accept that some people just aren't right for each other.
And some guys get rejected and blame it on themselves, then they either mope for awhile, or try to improve themselves, then try again. (This is the category i fall into, it's probably not as healthy as the first option, but it seems far preferable to...)
But some of them get rejected and blame the women. Maybe they were unlucky and were hitting on/involved with a bad apple, or maybe they're just projecting the personal problems in their own life on others. I don't know. I'm also not sure if they actually give up at that point, or continue on in the "sure knowledge" that the women they're hitting on are actually horrible feminazi golddiggers. Because hey, having sex with a horrible feminazi goldigger is still better than masturbation, right? (Reality not usually being black and white, it's probably a bit of both.)
(And of course these aren't strict categories. Individuals may have have a tendency towards one of the categories but have a different response in a particular situation, or drift into another category over time. The switch from "blaming oneself" to "blaming the womens" seems to be a particularly popular one unfortunately.)
I can say as a male that i've never felt under-valued or discriminated against, either in society or in the workplace. And certainly not every individual woman has valued me as much as i would like her to, but then there have also been at least one or two who valued me more than i really wanted them to. And despite the mismatches i have persevered and have had what i consider to be a reasonable number of relationships in my life, a couple short-term but mostly long-term.
All of the women i've dated have been feminists to a greater or lesser degree. They've also all been generally good people (one or two of them were more interested in quick lay and then moving on to another conquest than anything long term, which made me a bit sad at the time, but that doesn't make them bad people.) None of them seemed to disrespect me or under-value me, and none of them were looking for a "walking wallet" to bilk. Obviously most of the relationships didn't work out in the long run, but it was never because they wanted more money or that they didn't respect me.
Most of the women i know as friends or coworkers also seem like equally good people. I've never actually encountered anyone who was clearly looking for a "walking wallet", but perhaps as someone making slightly above the average middle-class income who doesn't tend to flash what money i do have i'm just not attracting the attention of such people. I've certainly heard of some specific women who may fit that bill, but they seem relatively rare. Likewise "feminazis" who actually hate men seem to be a lot rarer on the ground than the critics of feminism would have you believe.
So the common thread i see is that men who see difficulties in dating as being due to chance or their own personal failings generally end up finding a woman who's worth being with, possibly after a number of false starts, but eventually. While men who blame women for the problems they encounter only seem able to attract women who want something other than a positive emotional relationship.
The women i know, the ones who in my experience seem like decent human being and seem to make up the majority of the female population, usually seem to be pretty good at sensing when a guy doesn't actually respect them, and they tend to run screaming. (Well, not literally. Most of them are afraid to respond in a strongly negative fashion because they're worried that the guy will flip out, but they'll still try to extract themselves from the situation.)
So it seems pretty clear that if your initial assumption is that most women are money-grubbing jerks who don't respect you the women you meet are going to pick up on that, and the only ones who will still be interested in dating you will be... money-grubbing jerks who don't respect you. (And for the people who do approach women like that, perhaps the women who rejected you aren't actually "feminazis who hate all men", maybe they're just feminists who dislike people who act like you in particular.)
Which puts you in the situation of either dating undesirable people or retreating to video games and porn. (As opposed to dating desirable people and enjoying video games and porn with them.)
The solution is theoretically very simple, though obviously a lot of people in that situation find the first step of actually accepting that women are people who are pretty much the same as men and worthy of the same respect to be a very difficult one. If they can manage it however, things will get better.
And for those who haven't fallen into the trap yet, remember that the problem may not be you, but it probably isn't them either. And if you want to try an improve your odds do it by improving yourself, not by adopting a false facade to try and manipulate people. If you get in shape because you want to feel better about yourself that will show through. If you only get in shape because you think a six-pack will attract girls that will show through as well, and the girls you attract will probably be as shallow as your motives.
(And as an aside, if men are so under-valued why are movies and TV, and the merchandise associated with them, targeted at men so frequently? Do we have more money then the women? (In which case we're certainly not under-valued.) Or are we being catered to despite not having more money? (In which case we're actually being over-valued.))