The only thing that makes an evil “lesser” is that there is less energy going towards supporting it. By putting it into power you make it the greater evil. “Lesser evil” shit is something everyone has to unlearn if they are ever going to help anyone. How far capitalists and the state are willing to go is as far as they think they can get away with. If any capitalist or politician is being held back by morals, they will be replaced by ones that aren’t. If there is a profit margin to squeeze, anyone willing to squeeze it gains that power. People can get away with a lot more with less scrutiny, so the lesser you think their evil is, the more of it they can get away with.
The “lesser” fascist is still a fascist, and fascists spend much more of their time attacking us than attacking each other, and on top of that even if they do attack each other it’s through attacking us.
“Lesser evil” is an idiom and as such should not be taken literally. It essentially means that between immoral options, the least immoral one should be chosen.
In a democracy, a voter will often have to choose between candidates while none of the candidates espouse the exact same positions as the voter. The voter is essentially faced with a multiple criteria decision. I’m against the idea of not voting on account of there not being a candidate filling all the criteria. Voting remains a fundamental way of influencing our governments. You can get involved in other ways as well if you wish to do more.