I suspect most of the amplification of right wing noise has something to do with the left wingishness of the complainers.
My stance comes from seeing it from the other side. I'm comfortably right of center and my previous experience with Twitter (x is a stupid name) is that it absolutely was a left wing echo chamber. It indeed was rather calmer because of the aggressive pruning of any conservative voices.*
I believe the algo serves you aggressively oppositional views to spur contrary posting and raise engagement. It's a rather simplistic but effective tactic. If you're leftish, you get served the worst of the right, along with a strong current of fringe left views to affirm you are "reasonably left, not like those crazies". If you're conservative you get the worst of the left, and a current of toxic right wing enough to affirm that you're not that far right.
My "for you" feed is exclusively militant socialists, feminists, pro trans activists, leftist local politicians (not hard to find as I'm in MN) all just ceaselessly toxic people.
My "following" is like wise a cess pool of right wing commenters, the worst of the worst shouting all sorts of racist, anti women nonsense, interspersed with occasionally interesting comments about ttrpg games and science subjects that are actually interesting.
I joke that "for you" is comments entirely from people I completely disagree with and despise. "Following" is only *mostly* people I disagree with and despise.
(I actually "follow" only maybe a dozen people in science, tech, ttrpg gaming, and work-related subjects. No politics, no dogmatics of either side. Certainly no politicians.)
As a result, I spend almost no time on Twitter
*(Nota bene to this day I still have a banned account from just before musk's takeover for a post in a David Axelrod thread, observing that transsexual strippers & burlesque dancers seemed to militantly insist on the right to dance in front of children to "express themselves" but I'd failed to see any comparable insistence to dancing in front of the elderly.)