I think his election was a protest against the expanding liberal lunacy (SJW, safe spaces, if-you-disagree-with-us-you're-a-racist-nazi, etc), the media ("we control the narrative and tell you what to think"), and do-nothing politicians (especially Hillary).|
And while I like that he's not a career politician, he also doesn't have decades of experience of choosing his words wisely. So he just gets on twitter and says whatever pops into his head. Which could be problematic if he keeps starting immature "beefs" as President.
But I like most of his policies, including stronger immigration enforcement (not holding my breath for the "great wall", nor do I think that will actually matter much because most use tunnels), trying to bring back or at least keep jobs here (including H1B reform), and not starting WWIII with Russia which Hillary seemed hell-bent on.
As far as climate change, I really don't think it matters at this point. It's too late to make any kind of meaningful impact. We needed to act decades ago. Whatever happens, happens.