the fact that teachers that make tenure basically can’t get fired for lack of performance is ridiculous

Had a friend who worked in one of the worst performing public schools in our city. According to him the main problem was that you simply couldn't keep good teachers no matter what you offered. Half the new teachers they hired didn't make it past the first year. Had they started firing teachers who underperformed on top of that they wouldn't have enough teachers left to keep the doors open.

edit: not disagreeing with the idea that tenure for teachers is a bad idea, just that I don't think that is the primary problem in these worst cases.