Trump has criticized the Fed on numerous occasions.

He's criticised everyone. I'm tempted to claim it "mere prattle without practice", because he hasn't made policies against it. Saying "Oh, this is so, so bad." is all well and good, but doing something about it is another matter.

Trump has a platform to remind the public who it was that betrayed them.

I'd be inclined to say that he reminds the public of whatever keeps him in power.

^{views expressed by me do not necessarily represent my views.}