I wish I could share your optimism. But just because a voter has an unfavorable opinion, it doesn't mean that they won't vote for them. Many will choose "the lesser of two evils", and the current administration has devoted a lot of effort to convincing supporters that their opponents are even worse.
The President is not in fact on the ballot this year, and quite a few will say "I don't like the President, but I like the local Republican candidate more than the local Democratic candidate". Except that the President should be on the ballot: the only serious question facing Congress is whether they will support his policies or take measures to oppose them. That's going to happen exclusively along party lines. Nothing else that either candidate promises actually matters.
It's all made worse by efforts to put a thumb on the scale. That, above all else, makes this feel like the last chance we'll have to fix this. I'm going to hold out hope that we'll take it.