I won't write in anyone. I just will not vote.
For me the issue wasn't that he signed a bill full of pork. That was necessary because he has no line item veto. The problem was that he sent his people (on behalf of the white house) to negotiate directly with the POS democrats and bypassed the one piece of the legislative branch his party supposedly controlled, thereby neutering their power. Then he compounded the issue by publicly attacking the Kentucky senator that wanted nothing more than a recorded vote. Obviously he would still have signed the bill created by the Marco Rubios and other so-called conservatives, because as president that was as good as he could have gotten. It was his control of the process that alarmed me.
If the election were held today, I would likely go vote for Trump because I think the anti-Trumpers are total douchebags and anything I can do to push them toward total lunacy is a good thing. I could list all the stuff Trump has done to infuriate me, but none of it comes close to the idiots with TDS and the unprincipled partisanship of the dems. It would be a close call, but I could probably justify it because I know he won't appoint judges to the SC that will condone ripping babies apart to the glee of the folks that promote infanticide.