I'm far from a hardcore liberal, but even if I were, I can't really think of anything Trump has done that harms law abiding Americans.
Policy wise - taxes are lower. He's done nothing to take away any freedoms currently extended to people. I think despite all the hubbub around the SCOTUS appointments, he made 2 solid choices there. I don't feel any more or less safe than I used to. In terms of the bad stuff? Mass shootings were happening on the regular before Trump and I expect they will continue after him. If I were an ardent supporter of his, I'd probably be at least a little miffed that illegal immigration has gotten worse since he took office seeing as how he promised to completely eliminate it. And yes, I understand that he has some barriers there (no pun intended.)
Do I think he acts like a 5th grader? Yes. Does he have an immeasurable ego that needs constant stroking and reassurance? Yes. Do I think his Twitter rants are funny or productive? No. But none of those things have a tangible affect on my life. Overall, I can't complain about the job he has done.