Black and Frieza are practically fictional nazis. There’s even a trope on this: That Bulma one was mostly Bulma’s fault. Roshi asked to see Bulma’s panties, Bulma didn’t know Goku removed her underwear, and she flash Roshi. Yeah, Roshi was grossed for asking, but he didn’t tell her to strip. I can see the issues with Roshi, but it seems weird to call him any worse than the other characters in Dragon Ball that people love.