I mean yeah those are good motives.

Also Spinner probably didn't actually do real crimes until the Stain event happened. At most he probably did some shoplifting. Someone who's lived in a racist town being shown someone wants to make the world good (through ill means) would inspire him to act.

Toga and Twice definitely need mental health and extremely were failed by the system. Magnes may have been as well (but that might just be me latching onto the idea that Magnes did her villainy due to lash back at the world).

Dabi is, if he is Endeavor's kid (he absolutely is) the eldest in that family. He has blue flames, which are hotter than regular flames. It's entirely possible Endeavor abused Dabi EXTREMELY badly.

Kurogiri and Compress are the only villains in the League of Villains who don't have an at least compelling motive, at least to me.