I make these assumptions because the type of people who use the type of language that you do and espouse similar views to you tend to also do these other things. It's called "generalisation", and although I apologise if I've made an incorrect one, it is a part of human thinking and everyone does it, including you.

It is my belief that the terms "good" and "bad" are poor labels and not suitably descriptive, especially for most political ideologies. I can only say that Democrats tend to enact policies that I agree with more while Republicans do not. That is why I say that Democrats are "better". Whether "better" means "good" is irrelevant. I don't like the two-party system and I work to change it by circulating ballot initiatives to move us toward proportional and ranked-choice voting. But when we only have two choices, it makes sense to vote and campaign for the one you disagree with least, then criticise and exert political pressure as necessary to nudge them in the right direction. Note that political pressure comes only collectively as a voting bloc, and a voting bloc that doesn't participate isn't going to be effective at exerting political pressure and having their demands acceded to. I understand that you vote, but not everyone who thinks the way you do does.