There is so much evidence of election misconduct it supports the very question in deed is it possible to restore integrity. What was revealing in 2020 was the overt, almost braggadocio way election officials violated the law in the open, giving press conferences to confess, nay brag about there crimes. We processed ballots that appeared well after the submission deadline set by law, without the traceability or supervision required by law, and mixed the ballots with legally processed ballots so as to make them inseparable in direct violation of orders from 3 federal judges and the United States Supreme Court (Georgia). At least 6 states had nearly identical violations reported by the perpetrators in public statements and press conferences "in their own words" (almost as if all these elections officials were reading from the same script). So secure in the notion there could be no consequences brought upon them, a confidence now proven founded. They were of course just following orders.
We honestly have no idea if ballots were or were not properly processed in past elections, if every vote cast was from a valid, legal and living voter, and so on. Honestly considered there are a million or more ways to corrupt without detection. But in 2020 we know, by public statements of those responsible, and other clearly observable facts Compare the number of votes cast, as an example, with the census estimates of adult population and you will note several states reported turnouts of over 100% of the adult population. You will if you are diligent find more than one state.
Yet those asking "how can this be" are misinformation propagandist soon to be criminal wards of the federal government.
Regardless of your desired outcome, if you ignore the public admissions and claim it's all made up misinformation, you are in fact the misinformed.