The only ones to get screwed if Trump runs as an independent are us. A third party candidate will never win. NEVER! Might as well pull the lever for the D if you think this is a solution.
In the UK if we hadn’t done that - i.e. UKIP we would NEVER have had a referendum on the EU and make that important change.
I know its a different system, but pulling a lever for a dem is as good as pulling for a republican at this point - you get shafted either way.