Pre-elon twitter banned some nazis, sometimes, there were still plenty of them around. It also banned a-lot of normal people who were questioning official narratives, people who just so happened to get report-bombed, people who were joking around with eachother about innocuous things that weren't against the ToS, people who governments wanted banned, etc etc.
All of that has gotten much better, and appeals are approved much faster, much more often. It used to be if you replied to a tweet disagreeing with someone, and their fans/followers report bombed you, you'd get banned with no recourse. That's fixed now.
Also, my impression of recent twitter is that it's very heavy on user silo's now, sure if you search for objectionable content you'll find it, that's not unique to twitter, but you don't really happen upon it unless you're following people who post things you find objectionable.
I don't really see anything wrong with that model, and if you're truly worried about nazi's, wouldn't you rather it's on a public cleartext platform instead of on something like session where it's mathematically unable to be seen/policed by -anyone- not directly involved?
And like, I'm no fan of Ol'Musky, I think his accomplishments are mostly him attracting talented people and then taking credit for it, but to say that twitter isn't safer/better now... idk, seems like it is by any measure, which might be because it was horrible before, and it's simply less horrible now, but, still, less horrible all the same.