What has he succeeded with? Yeah, he's tried to do some of those things, but none of his attempts have been successful. Roe v. Wade still hasn't been overturned, Mexicans still aren't being mass-deported, construction on "the wall" still hasn't started, his "repeal and replace" healthcare bill is stalled in the Senate, and his travel ban has been slapped down once and is likely to be slapped down again soon. Like I said, Trump may really, really want to do all these things but the realities of life and politics in the US will keep him from being successful.
So while it may be worrying that we have a president that would even attempt to do these things, the hysteria that he will turn his promises into policy is unfounded.