I think Twitter is worth less mainly because Musk removed some kinds of censorship and by doing that, scared advertisers. Not because the layoffs actually caused any significant technical issues. I don't think they did, since from a technical perspective X works just fine right now.
He also removed the people selling the ads and the people working on the ad targeting platform, mind you. I think that's what differentiates from a normal "PE gutting/squeeze" and what people should be analyzing, but everyone (from "both sides" of the Musk equation) gets caught up on the uptime number for some reason.