Well, i found a fix worked in for OpenRA whilst searching github comments. It's a command line option
OpenRA-*.AppImage Graphics.DisableLegacyGL=False

It's worse than you think. They're forcing the OpenGL into games (and also emulators) that don't need it and used to run fine with just software rendering on computers from 20 years ago.
Here's just one example. This version runs great on my slow armv7 board that boots /dev/fb0 at 640x480, without the proprietary Mali GPU driver.
So anyway, now I archive old versions of the games and emulators I like, and ignore all the new ones.

ChaosEsque uses a version of the Darkplaces engine forked 10 years ago (right before they broke rendering on old intel integrated GPUs). It ports over some features from time to time.

Additionally we did some more intensive hacking on the engine and extended the 32k entity limit to a new maximum of 4 million networkable entities. We had requested this before but were told that "it's too hard to change all the darkplaces internals to support this". It wasn't too hard for us. It did take 3 weeks of investigation and tracing of the uncommented code.

Our version also retains "LordHavoc"s actual given name: Forest Hale, in the credits. Not his new "sawn-off-dick-and-balls-one-year-after-joining-google" (ashley rose 'LadyHavoc' Hale). As our fork predates any of that.

Additionally: our fork of Xonotic predates Xonotic itself: the rcal pistol and various other changes were from the Nexuiz days. We also are the ones who campaigned for Nexuiz to be forked in the first place (since LordHavoc was CHOPPING off weapons from the game): So yes: we are responsible for all of it to begin with.

FTE dev was mad
https://rbt.asia/g/thread/80439845/#

<eukara> really getting desperate using a russian proxy, why even bother posting when nobody wants to hear what you have to say?
><eukara> you end up banned. every. single. time.
><starsomething> I've never been banned
><starsomething> anyway I did what you couldn't or wouldn't
><starsomething> 4 million ents in DP
><eukara> you're fucked in the head, right?
><starsomething> suck on it faggot dick chopping-supporter
><starsomething> nope
><eukara> clearly
><starsomething> I'm a licensed attorney.
><starsomething> what are you?
><eukara> prove it
><eukara> you're making a lot of assumptions about others being inferior to you, when you do not know them and you're clearly an egolomaniac
><eukara> but you could never exercise power over another adult, that's why you target kids
><eukara> you disgusting prick
><eukara> you're just as simple to figure out as any other insane person.
><eukara> and clearly you're not a good attorney, because why else have so much time on your hands modding Nexuiz of all things.
><eukara> like wow, no life confirmed!
><starsomething> eukara: I'm not like you: I don't have to work.
><starsomething> I just do my hobbies
><eukara> because you don't have work.
><eukara> you're a fake.
><eukara> you have accomplished nothing.
><starsomething> 4 million entities says otherwise.
><eukara> not a single person knows or cares that you exist.
><starsomething> and my marble floors say otherwise :)
><eukara> you don't put your real name out, people won't remember your alts.
><starsomething> the purpose to do the thing is the thing itself.
><eukara> so 'doing your hobbies' 'not having to work' is worth bragging about, when it's clear you're not doing any goodwill



><eukara> no one cares about 4 million entities in Darkplaces. Nobody sane would ever need that many visible entities.
><eukara> that's unplayable over the network.
><eukara> but you don't care about that. in your little head you think you've figured it all out.
><eukara> and I'm wrong.
><eukara> funnily enough, you used my code from FTE to make this work. So no, you're a talentless, worthless hack.
><eukara> go away.
><eukara> Be a Narcissist in your own 4 walls.
><starsomething> ill be with you in a moment
>~eukara 46.23.94.114


<starsomething> ill be with you in a moment
><starsomething> Glad your mad I used your algo :)
><starsomething> pound that sand boy!
><eukara> it just proves you have no talent.
><starsomething> you can even revoke the license to use it and sue me :)