Newcomer to this forum. I think that any reasonable person should be worried about Donald Trump, and there's no equivalence between his candidacy and Hillary Clinton. At best Hillary will do as good a job as her husband did; at worst she's a somewhat corrupt left of center progressive. Either...
Newcomer to this website, and to answer the titled question: I think that overall President Obama has done a pretty good job. I didn't vote for him either time, and I'm not 100% satisfied, but I don't think he has been in any way a disaster.