You are proceeding from the assumption that it matters how good a case you have. The legal system is not about justice, it's about who has the best lawyers. And it's not just limited to legal costs; there would be PI harassment, character assassination, and other dirty tricks. I don't think you fully understand the depths to which some employers are prepared to descend in order to win cases like this, even if it ends up being a Pyrrhic victory.
And good luck getting ANY member of the bar to take on your case unless you have high-res video of someone describing how they're going to fire you illegally. Representing yourself has its attractions, of course, but without courtroom experience or being able to formulate a counter for some insane legal technicality that opposing counsel will pull because they can and fuck you, you're done. You've wasted all that time, lost, and made yourself unemployable. Even if you DO manage to find a lawyer that will take your case, that lawyer will also suffer the consequences of fighting his corporate masters. There are companies that will put an attorney out of business, even try to get them disbarred, if they cross them.
Even if by some miracle you DO win your case, or get a favorable settlement, you are forever associated with not putting up with your employer's shit. Once that gets around, you will not be hired elsewhere, and if you are currently employed, you'll be mysteriously laid off in a "reorganization" or because you're "no longer a good fit for the corporate culture" (which isn't a lie, the corporate culture could very well include "firing people who dare to not take all our abuse like a little bitch".) You'll be a "troublemaker" and "malcontent", and employers don't like to hire people like that, especially in a soft job market where there are probably 400 other applicants willing to eat the shit sandwich they're given and smile.
You sound like you think you live in an ideal culture, where the truth matters, and justice is more than a platitude. The courts can be bought.