My take on this; he's a slimey git, yes, he's probably destroyed his marriage, but, from what I've read through in the leaks, I have to admit that there isn't much there that makes me think him being cleared of wrongdoing was incorrect. It appears to me as though they've been having an on and off affair, she's lead him on and dangled enough for him to chase and didn't seem too unhappy doing so.
My hot take? He refused to leave his wife and she's gone to HR, refused the hush money through wanting more, didn't expect him to be cleared and then leaked it herself to destroy his marriage.
Could be way off the mark and there could be more we haven't seen yet that will incriminate him beyond adultry, but I haven't seen it yet.