This absolutely happens. Team Fortress 2 Classic dropped Linux support outright a few years ago in favor of Proton support since it’s easier on the devs to do, and even as an avid Linux user I don’t blame them.

This was true, but a big part of that reason (as followed up on by some other devs) is that Linux users are usually tech-savvy, and frequently work on software. They contribute more bug reports because they know how to report a bug. You’ll have more bug reports, but not necessarily because there’s more bugs (though that too), and as a bonus the users reporting them will probably be able to help you fix those bugs a lot better than the average Windows user.

Linux has had awful drivers for graphics cards

Not been my experience at all. Or am I misunderstanding and you’re saying that’s a past problem? Because I’ve used both AMD and Nvidia drivers on Mint and they’ve both been fantastic.