Well, first, the allegations being silenced are more than just vote suppression. Second, how can anyone expect to find evidence when news, entertainment, and tech companies who control the flow information in public media, private media, and de facto public squares, have colluded toward a particular outcome?
More importantly, how can you be so sure that 45 had "autocratic tendencies" when presumably your sources of information are controlled and manipulated by the same participants in this conspiracy? Bias may be unavoidable, but in "fortifying" the elections, what these people have really done is perpetrated a mass well poisoning, though IMO this started before even the first election.
I would further argue that manipulating the flow of information to suppress one side on a mass scale, particularly when these are not fringe ideas, does amount to a form of voter suppression. We should all be concerned by the notion that a handful of oligarchs flexed their technocratic muscle to effectively manipulate tens of millions of people. Bear in mind also that these oligarchs had non-political motivation to collude, given the adversarial relationship between trump and media, and the rumors of a possible crackdown on/breakup of Tech's dominance over modern discourse. This was an unprecedented flexing of soft power concentrated in the hands of a tiny fraction of the population, ostensibly in anticipation of undemocratic behavior. And as a bonus, it becomes a self fulfilling prophecy when this "cabal" can then unilaterally label any questioning of the results as damaging to democracy because by controlling the content and flow of information.
There's a far larger issue here than the results of a single election.