Yes indeed - all of these problems should be addressed. I agree. The one bit I've not seen reliable evidence for is this:

They stole an election, and they destroyed faith in the system.

Whereas there are indeed problems with the voting machines and a great need for election reform in the US, Biden had 8 million extra votes. Hilary had 3 million extra votes. In an actual democracy, these votes should elect the president. Is there a significant margin of error in some districts? Perhaps.

Election reform is so important that the Democrats put together a bill that would have helped get more people to the polls. Guess who blocked this extremely important bill: https://www.reuters.com/world/us/democrats-voting-rights-plan-faces-long-odds-us-senate-2021-06-22