We'll disagree on terminology but agree on general principle. Trump's Contract with the American People lies in tatters, as the first day...then the first 100 days...came and went with basically no movement. The opposite of some have happened. And that's not even including the other promises he made such as better health care for more people for less money; getting along better with murderous dictator Putin; and, yes, the Wall, which he put back so far that now he has to declare "national security lol" so that two branches of the government can overrule him, not just one.
You're saying he broke one big promise, I'm pointing out the dozens, hundreds of smaller ones. You're saying his credibility was killed by a bazooka, while I'm saying it was killed by a machine gun. We can both agree: it's dead.