I've always thought the word "insurrection" to describe what happened gave the people way more credit than they deserved. It was a riot.
As for the other theories (e.g. stolen election), I arrived at my positions not through propaganda but instead through reasoning. To swing the election for Biden to the degree the stolen election theory requires would have necessitated a massive conspiracy across multiple states involving hundreds of people. It's pretty much impossible to keep something like that a secret. Someone at some point would roll on the rest of the group.
I do think there's plenty of shenanigans in most elections. I think the new hotness this year was ballot harvesting with the absentee ballots. We already have seen both parties affect some elections in California with ballot harvesting and I think we probably saw a fair bit of it across the country last year (even in states where it's illegal, like Georgia). But that kind of stuff is ground level, not the result of corrupt election officials dropping in thousands of fake ballots.