The systems of oppression we face were established long before he was president (or even born), and while he was an enthusiastic enforcer and beneficiary of them, and a complete piece of shit, to pretend that he is the single source of all our problems isn't only wilfully ignorant, it's also massively counterproductive since it shifts focus away from the fact that we face systemic problems that only systemic solutions (rather than just changing the clown who heads the circus) can resolve.
Of course not, but he represented a huge change in the face of it. Before there was an attempt to keep it in the shadows and publicly at least, act good.
But they were all of them deceived, for another political dogma was made. In the land of Washington in the fires of K Street, the Dark Lord Reagan forged, in secret, a master dogma to control all others. And into this dogma he poured his tax cuts, his deregulation and his will to transfer all wealth from the Many to the Few. One dogma to rule them all.