I imagine that you guys never hear about or see it in any of what you read or watch in your preferred media. Nor does your Manichean world view admit to the possiblity. But, yes, Trump does nice things all the time.
For example:
- Cut funding to sanctuary cities.
- Cut travel from certain terrorism supporting countries.
- Withdrew from the TPP
- Approved the Keystone and Dakota Access pipelines
- Got Judge Goresuch approved.
- Restricted lobbying by former officials.
- Adopted pro life policies.
- Promoted training in trades and apprenticships
- Praised the American Legion Boys and Girls Programs
- Promoted economic confidence in a number of ways.
- Promoted advocacy for small businesses
- Approved changes in military policies that drove ISIS from Iraq
- Etc...
Of course, it might depend on what you think is "nice."
But beyond that he's often nice in the ordinary sense of the word. He's famously very nice to people he meets and enjoys chatting up workers, security people, etc. He can be very charming when he meets with dignitaries and the like.