Are you watching from the beginning or only where Toonami is at? If it's the latter, then that's understandable. You haven't seen any of these character's arcs or backstories and how their personalities got established to where they are now. Remember, the show started 200 episodes in, and with what is accepted by the fanbase to be not only the worst arc, but the only canon one that has absolutely ZERO impact on the overarching plot.
Not to say you'd like it if you did start from the beginning, of course. Just saying, this is a possible reason why you don't now.