I don't think he's made it worse, but when he took office the economy wasn't exactly in shambles. In other words, he inherited a pretty good economy from Obama.
What I have noticed is that the stock market has been headed much higher since Trump was elected, though I'm not certain there's causation there. Trump is obviously pro-business, so that helps. He can't take credit for everything though.
Trump is clearly the most unpopular President ever and it is during his tenure that America has been prosperous for more than a decade. He can't attribute his great economic management because he "inherited" a great economy from Obama.