But if Ratimov is indeed a serial plagiarizer I'm sure a Russian speaker would be more able to tell if this is true or not since he is so active on the Russian subforum.
This has not really about the Russian language. Ratimov was copy-pasting texts that just barely technically didn't qualify as "plagiarism" according to forum rules and/or moderator interpretation but it would have been plagiarism for a reasonable observer. Whether he has done anything like that since then (this was 2-3 years ago IIRC) - I don't know, probably not, he's one of those adaptive sleazeballs except when he flies off the handle and starts attacking people who dare to call him out.
Definitely not DT material but it has little to do with DT members being afraid of him as the useless shitpuppet OP is alleging. If you look at Ratimov's DT1 "sponsors", there is quite a bit of backscratching going on, Russian members supporting him for whatever tribalism they have going on there, and a few others who probably can't be arsed to research whom they have in their trust lists (and arguably shouldn't be in DT1 themselves, I mean Best_Change LOL).