It doesn't take much effort to search the internet for evidence that these machines have been thoroughly tested and undergone software audits.
The U.S. Election Assistance Commision audits voting systems.
And here's an audit of Dominion software by the State of California.
That's just a starting point.
You’re incredibly naive...sorry. You’re basically stating that the government doing an audit of the equipment they decided to buy, knowing what could be done, is, somehow, trustworthy.
I am a software expert - I’m not going to argue with you, these machines are not secure. It isn’t debatable - all you need to understand is their architecture.