33 states in the Union *require* their electors to vote according to election results, 14 will even nullify faithless votes and replace them immediately. California will go as far as to imprison faithless electors for up to 3 years. I'm very familiar with how this works, I'm not so sure you are.
https://en.wikipedia.org/wiki/Faithless_elector
If the state legislature has serious concerns about the legitimacy of the vote and could substantiate the concerns with evidence, it is well-within its authority to postpone certification, recount, audit or perform any other procedure to guarantee an accurate count. If such a situation were to occur and the legislature did find forged votes in numbers that would cast a shadow of doubt on the legitimacy of the entire election, I would be perfectly happy with them throwing the results in the trash and calling for a second election. Any reasonable person would say the same, sending electors on the basis of an election that is fraudulent would be asinine banana republic nonsense. Since forged votes were not found in numbers that would justify any such concerns, this did not happen.
Your hypothetical scenarios are entertaining, but I'm not the one here who needs to come to terms with their own internal inconsistency. From what you've outlined so far I have a pretty good understanding of your position - measures like the filibuster are "undemocratic" and "authoritarian" when someone like me uses them, they are only permitted to be used by Lacius in order to save the Republic. Perfectly consistent - with other Democrats, not your stated principles.
As far as I'm concerned, we're done here. I genuinely have nothing else to add, my position on this couldn't be more crystal clear. We might continue this conversation during my Presidential run - sadly, this is a thread about Joe Biden, who appears to be flip-flopping on the matter as we speak. His current stance is "let's kill the filibuster without killing the filibuster", or more specifically, "it was better back in my day" - spoken like a true fossil.
https://slate.com/news-and-politics/2021/03/joe-biden-talking-filibuster-support.html