Did you really think you were going to get carry reciprocity anytime soon? Could you not see then, and now, that that will require sizeable Republican majorities in the House and Senate, and that there was no way for Trump to move the needle on that issue all by himself, especially after the midterms?
Carry reciprocity is kind of a niche issue, lacks enough popularity, and is hard to make more popular. Well, maybe now that the gun stores are empty and millions more are armed than were before March, maybe now carry reciprocity can become popular enough. Before March, the 2A was just barely popular enough to be difficult to gut.
I dunno, if you really care about that one issue, you know Biden won't give it to you (he's not even promising it, and it's not something Democrats want, obviously, else it would have passed already). Trump can't give it to you unless the needle has moved a lot, which... maybe it just-now has. So if this is your one issue, I'm shocked you'd be so angry as to hold it against Trump that he's not been able to deliver it to you. There must be like, three people who care so much about just this one issue. Maybe you could use more issues to make up your mind.
What a strange and minor issue to pick as an example. Do you have a list of promises not kept? I'm curious how they break down into ones that could not be kept because of Congress and ones that Trump reneged on.