Law suits cost both parties a whole truckload of money - replit almost certainly has a larger war chest than you and can outlast you.
It's easy to stand on the sidelines and criticize this person for not being a martyr to the cause of our terrible legal system - but, while such a lawsuit would never throw you out of your home, it could very quickly drain your personal savings which, if you have a family that's reliant on that savings for future education, could be devastating.
It is 100% reasonable and a good idea to reach out to the EFF if you're being cyber-bullied by a corp with an axe to grind, but standing on your own in this sort of a scenario is certainly going to inflict a fair bit of pain on the aggressor - but it's likely going to inflict a whole lot more pain on you. Lawsuits like this can be tied up in appeals essentially until we die of heat death given our legal system unless you get extremely likely.
Additionally I feel like you're making the assumption that the work a lawyer does is essentially busy work - discovery is an insanely expensive process to comply with and messing something up during discovery and accidentally deleting a key piece of evidence won't get you a "Well, you're just a rando - we'll let it slide" from the judge.
Lastly - if the trial actually did end up going to court, it's extremely likely you're going to lose without the assistance of a legal professional, US law is insanely complicated and I can almost guarantee that your current employer is breaking some law on a technicality currently, I have no idea what it is - but without legal council neither will you.