They are really slow
I don't like being stopped every town by my dipshit rival or the generic 'wes gun mak da would wouar wae' evil teams
I can excuse the gen 3 evil teams because Aqua team is a bunch of pirates (I like pirates)
Team rocket is an s tier evil team, because they are just criminals and not generic dipshit idealists, and the fact that they were involved in the creation of mewtwo and possibly ditto make them more interesting than the Rick Sanchez mafia and Peta