I don't think a "Putin link" is necessary to build a justification.

It's enough that Musk is a bilionaire controlling the platform and intefering in it: that thing is not a fair platform of communication, it's algorithimically shaped to make it a Propaganda vehicle and there's no point in frequenting a place whose function is to make you think and do what others want you to think and do.

This desperate attempt at a finding a "Russia excuse" is a massive Americanism reminiscent of McCarthism and generally boils doing directly or indirectly a self-serving excuse from politicians from "moderate" parties who have spent the last 2 or 3 decades serving interests other than those of their voters and who now are reaping the natural results of that, and they want to blame anybody else but themselves. When the rationale "by an amazing coincidence" entirelly absolves the people putting it forward and doesn't come with strong proof, it's bullshit until further evidence for it emerges. We saw a lot of that shit parroted by Democrat tribalists here in Lemmy right after their loss in the Presidential Elections in the US - the fault was from everybody but they themselves.

I don't really know how much Russia interferes with Twitter or with the various elections the West (I'm pretty sure they at least try, but there are so many interested in making it seem huge and shifting all the blame to it, that what we common humans with no access to intelligence brefings hear about it is too thick with propaganda to be trusted), but then again the same goes for Israel and other countries and even individuals with enough means to pay for it (or ownership of media vehicles) who have an interest in shaping the outcomes, especially multi-millionaires and billionares - remember the massive role of Cambridge Analitica in Brexit, and they were paid not by Russia but by wealthy Americans.

What I'm saying is that ultimatelly it's the being a Propaganda outlet that matters and the "whose propaganda" is irrelevant: none of those actors are doing their manipulative "opinion forming" for my best interests and their chosing to use such techniques tells me that they see other human beings as nothing more than puppets on their strings, so they're not the kind of people one can trust in any way form or shape.

Personally I droped Twitter following the whole Brexit thing and well before Musk, though the latter did made me actually delete my account rather than just leave it there unused.