If you try to measure Trump by some conventional, objective-reality based means, he is IMO, probably the worst president America's ever had.
But people didn't vote for him based on such reasons and his supporters don't judge him on such metrics. Trump is a subjective feeling and he makes his base feel pretty great, so...
How about "lies per word spoken"? How about "rationality of propositions ranked by economic analysis"? How about "number of personal lawsuits and investigations incurred per minute"? Any of those work for you?
I added an "IMO" for clarity. And yeah, I could supply a long list. This list could include items such as "climate change" and "foments domestic terrorism".
The point is, any such list will be based on assumptions that Trump opponents and supporters do not share.
"Helped" is a loaded word since everyone has a different opinion of what helped is.
I'm not a big fan of Trump, but I do have to admit he is delivering on what he said he'd do. Pass tax reform, curtail immigration, go up against China in terms of trade, get conservative judges on the Supreme Court, start the peace process with North Korea.
A lot of people may hate him, but he is getting a lot more stuff done than past presidents.