Can you imagine how much better the world would be if:
- Trump voters actually acknowledged they made a mistake
- Trump voters decided not to vote anymore because they realize they make bad decisions
That's all it would take. They wouldn't have to commit to doing better research next time. They wouldn't have to try to defend some of what Trump did, or decide which GOP candidates are actually being honest. Just say "Wow, I fucked up. I shouldn't vote."
It's like an alcoholic who wakes up in a puddle of their own puke. They can try to be more careful in their drinking. Or, they can decide "I can't be trusted around alcohol". But, it's not like voting in a controlled way is fun, the way moderate drinking could be fun. Voting is a chore. It should be a relief to be able to say "I don't have to pay attention anymore, I'm a gullible idiot, let other people take the reins".