I stopped "building" PC's over 15 years ago. There's literally no point, you end up with problems and incompatibilities and extra expense and - in the end - you get a PC that you can't upgrade any further than any other.
Yet I have 1000+ games on Steam, and god knows how many on other services and discs, etc. You just buy good commodity hardware and - although not "obvious" to complete amateurs, you should know if you've ever googled - a decent video card.
Last time someone I heard of that didn't have any PC experience tried to build a PC it was a mess, but because the guy was an idiot. They phoned my technician (who's a gamer), asked what to buy, then ignored all that and tried to cobble together something themselves.
They ended up with a shit AMD card, an underpowered processor and a PSU that could never have handled it. That's NOT what my guy recommended to them, in fact it's the opposite and for much cheaper they could have got a decent PC built, certified and warranted to work for the next few years.
It's not hard to do PC gaming, it's not hard to buy a gaming PC, but it is hard to be one of those overclockers, one of those people who builds all their own PC's, and uses all the "cool" tech to get ahead of the game, especially if you're an idiot who thinks it's all just modular and plug-and-play.
As someone who grew up with ISA cards, ports, I/O, etc. I can do anything that is required. But I stopped building my own a long time ago. I never even had an "expensive lesson" because of a mistake. My builds all worked. But it's too much faffing. I don't even know (or care) what the processor sockets are any more. I just buy off-the-shelf, but decent, hardware, pre-built, with a warranty.
It's kept me running on everything from Half-Life to GTA V without any problems. And it's been upgraded several times since (SSDs, etc.).
And, out of all my Steam friends, including all the overclockers and show-offs, the person with the most play time on their machine? Me. The person who's played the most games? Me. The person who buys the most games? Me.
I'd rather spend my money on one decent machine and then spend what I would have spent on all the junk and minor upgrades over the years on actual games to, you know, play stuff. The days of having the time to piss about worrying about PSU rail draw, etc. are long gone, precisely because I just want to play.
So PC gaming isn't hard at all. Just buy a gaming machine. Or get a decent "business" machine and maybe get (or slap) a half-decent nVidia in it. Hell, if you're that worried, buy a Steam machine. Most of those will play anything you throw at them.
What's hard is being a PC gamer as a broke teenager, or trying to build something that will beat all your friend's machines. You used to have to make-do and upgrade piecemeal and make the best of what came your way. Nowadays, anything you get in the shops with the right video card is just fine, and if you are really stuck, get one of those gaming PC websites to build one for you. It'll cost more than a console, but you'll get more out of it than you ever would a console.