The wall is a dumb idea (plus, no matter how many times he says it, he can’t make Mexico pay for it). Banning all practitioners of a specific religion from entering the country is unconstitutional (& unenforceable — all they’d have to do is lie at customs). His plan to arrest his political opponents, starting with Clinton, is also unconstitutional (& should terrify anyone who likes the 1st, 2nd, 6th, & 8th Amendments). His attitude towards civil rights protesters is going to get a lot more people killed (both cops & unarmed civilians). His attitude towards other world leaders is going to gets us into another war (if not WW3). His support of the so-called “First Amendment Defense Act” is going to ruin the lives of many LGBT people (& his running-mate’s support of so-called “conversion therapy” is going to *end* the lives of many LGBT people).
His personal policy of not paying taxes has damaged the US economy (& might be illegal). His personal policy of kissing & groping women without consent is DEFINITELY illegal (& gross). His business policies have led him to lose billions of dollars (making all of his claims about being an economic genius false). His requesting that Russia cyber-attack the US is just as treasonous as anything Clinton is accused of doing (if not MORESO). And his pending trials for fraud & sexual assault make him far more likely to go to prison than Clinton, who has not actually been charged with a crime yet (whether or not she *should* be charged isn’t relevant to your question, so I won’t go off on that tangent).
Also, allowing him to name the next Supreme Court justice will just reward Senate Republicans for their childish & unprofessional behavior this year (though, admittedly, that isn’t *Trump’s* flaw, but his party’s.)