Why is that "whacky"? There were Russian ads.[1] They obviously intended to affect the election result (because why bother otherwise). Whether or not they were actually successful in affecting the election is unknowable. But it's not flat-earther-whacky to think they succeeded.
1. https://en.wikipedia.org/wiki/Mueller_report#Social_media_ca...
I'm aware I'm biased, but in this case the facts are in plain sight for Russian ads. A Republican authored that report. You may think yourself unbiased by saying "both sides are the same" but both sides are in fact not the same at all.
The "right" may say the same about "election fraud" but saying is not the same as having a well-sourced report, and federal investigation that netted multiple indictments and convictions.
3 of the top 10 gab groups are pushing the Qanon conspiracy theory, one is pushing the “StopTheSteal” extremist movement.
I've seen equally whacky things trending on the left side, e.g. "Russian Ads on Facebook won Trump the election".