Yeah he did fuck with what he gave Pac. But Pac also owed money to Death Row. So when Suge needed, he took. Pac was mostly cool with it, but he said he wasn't happy being there.
And Dre doesn't diss Suge on songs, he does it in live performances. The Up In Smoke tour a few years back... Dre kept on dissing Suge. He wouldn't stop, same with Snoop. They both kept saying shit like "Fuck Suge" "Death Row is shit" etc., until someone from the audience started firing shots at them who was later discovered to be affiliated with Death Row.