It doesn't entirely boil down to who's "liked". It certainly didn't until about ten years ago. I could have lived with McCain or with Romney as president. I wouldn't have agreed with everything they wanted to do, but they're decent people. Serious and experienced. Intelligent.
Trump is none of that. He's a coarse fool who has no idea what he's doing, except playing to the lowest common denominator. We ALL deserve better than a president who supports white supremacists.