He will be more against queer people than whoever the Republicans put forth? Really?
If candidate A wants you to hide your queerness and use the wrong bathroom, and candidate B wants to force you to be straight or go to jail or a conversion camp, are you really going to throw your hands up in the air and say it's not worth voting?
Voting for someone does not mean you support everything they stand for. It just means you think they are the best option of what has been laid before you.
How much does it cost to not send them there in the first place?