i think he's a pretty positive force overall, he practically founded the free software movement, put in an insane amount of work into fundamental components of software like the GNU family, other tools, the FSF etc
yeah, of course he's extreme, in the sense that what he advocates for is almost unachievable in the reality of modern world, but an ideology is a direction, not an end goal, and i agree with him about the direction of free software he's advocating for
i've heard that he did some questionable things, but at this point I don't even remember what those things were, which is not to say that these things are perfectly fine and excusable or whatever, rather, that overall the work he's done makes him a positive force in the world