There were deep red states that swung to purple because people actually went and voted. You are one out of many saying this and therefore making it worse. If you don’t cast your vote then your vote actually means nothing and you’ve done nothing to change it.
You wanna know why then ask why. The why is because we don’t have a ranked choice system and convincing moderate democrats to go third party is not gonna happen. If you vote for any third party at this time, you’re basically just throwing your vote in the trash since you won’t have a chance to vote again. We need as many people voting for Biden or the next Democrat that would replace him, if he were to drop out, as we can get. Your vote won’t count otherwise. If you want to know why you shouldn’t vote for Trump, google Project 2025 and watch his rallies. Listen to how much hate he spews. He wants anyone who is not a straight white male to be slaves or dead. With recent changes from the Supreme Court, he will also be able to do anything he wants if he gets back into office and he will absolutely make it a dictatorship.