There's a term that applied in other fields to large-scale systems that are that incredibly sensitive to their input parameters: chaos.
Maybe you're talking about Gerrymandering, which is a very real method of undermining democracy, but I've never heard anyone refer to it as election theft.
In 2018, 66% of Democrats [0] believed it was "definitely true or somewhat true" that "Russia tampered with vote tallies in order to get Donald Trump elected president." Moreover, in January 2017, during the certification of the 2016 election, Democrat legislators made objections to votes from more states than did Republicans in January 2020. [1]
[0] https://today.yougov.com/topics/politics/articles-reports/20...
[1] https://www.newsweek.com/fact-check-did-democrats-object-mor...
Additionally, I'm not making any argument about the validity of claims on either side - just pointing out that the skepticism falls along partisan lines.
But I remember both Democrats and Republicans bleating on about stolen elections for years after 2016 and 2020.
Maybe it's a good thing I stopped watching late-night comedy!