So…. are you voting Democrat for every other federal position? If your premise is that the damage Trump could potentially do will be blunted by the Democrats in congress, will you be voting for the Democrat in your House race and (if applicable) your Senate race?
America survived (arguably did quite well in) the 1993–2001 administration of Clinton’s husband, and you leave unclear why you expect disaster to strike under hers. For example, you say “Under Hillary, there will be no undoing Obamacare” but that is meaningless unless you specify what you think is wrong with the Affordable Care Act. I’m sure there are any number of valid criticisms of the ACA, but what are yours and if you don’t give them, why should we take your objection seriously? Your previous paragraph ends with “Watch her try to disadvantage Republicans through campaign finance ‘reform’ and implement single-payer nationalized health care.” I agree that trying to use legislation or policy to electorally disadvantage the rival party is unethical (though why you lack confidence the Republicans in the House and Senate won’t be able to block such efforts, and yet express confidence that House and Senate Democrats could blunt potential Trump excesses is unclear), but again you don’t specify why you object to single-payer nationalized health care insurance — and it is insurance for health care, not health care in itself; please be precise.
Most of your other criticisms are standard anti-Democrat boilerplate (they’ll raise taxes, boost unions, make the federal government bigger, intrude on states’ rights, be pro-choice, etc.) Few of them are specific to Hillary Clinton, and while you end with “I’m happy to have explained my thinking”, I’m not sure you have, actually. You’ve displayed the results of your thinking, to be sure.
If I may suggest a significant reason not to risk a Trump administration, it’s that he’d very quickly become bored with the job. It’s not nearly as glamorous and positively-reinforced as campaigning, being president (or at least being a competent president) will require a lot of tedious behind-closed-doors meetings, policy reviews, intelligence briefings and such, with no reporters in sight. While off-the-cuff bombast gets cheers for a candidate at rallies of supporters, the same from a president causes stock market slides, affects diplomatic relationships, invites ridicule for the country in the domestic and foreign press. Trump’s well-established history included literally thousands of lawsuits, using the courts as an extension of negotiating his “deals” or in suits brought against him when he fails to live up to his end of those deals. This is not a strategy a president can use — he can’t refinance the national debt (or threaten to default on it, telling creditors to see him in court); he can’t tie up ISIS with court dates; he can’t get a restraining order against climate change (out of curiosity, what’s your stance on this — real thing or Chinese hoax?). President Trump will have critics — no president can possibly escape them — will he try to use the courts (or his new toy, the FBI) to silence those critics?
Saying Congress will blunt potential excesses from Trump may seem encouraging, but what happens after Trump delegates off his boring responsibilities to…I don’t know, do you? How many private agendas are likely to get served under the bored eyes of President Trump, a man who has never held public office of any kind, nor served in the military. Has he ever been part of something that wasn’t specifically geared toward his own wealth and fame? Will he care to involve himself in such now? At age 70, is he likely to warmed by the limiting cloak of duty for the first time in his life, or just shrug if off as much as possible?
Trump might make a good ceremonial president, one with no official powers except to show up at banquets and cut ribbons and be tabloid fodder. You’ve not convinced me he should ever be put in a position to grab for more. Vote for him if you must, but if you want to claim you’re doing after a careful and considered analysis, you’ll need more than this.