Almost everything is subjective or has some degree of subjectivity to it, but that doesn't mean you just give up on using a logical process to arrive at your conclusions. Man you're really gonna make me do this. Sigh ok here we go, I will start from the Kim fight because it's his first ufc fight of any significance.
Kim: 35+ at the time of the fight, retired after
Maia: Was nearly 40 going into the fight. And you referred to this as a win over "Prime Maia" I don't know if you're trolling or what here lmao
RDA: Years past his prime, undersized at ww. This was still a fairly close win for Colby as well.
Lawler: Was nearly 40 and far past his best, was on a losing streak going into this fight and continued to lose after.
Woodley: Was on a losing streak and visibly and rapidly declining. Lost his next fight after this as well and was cut.
Masvidal: Again old and past his prime. Was on a losing streak, and lost his next fight after Colby.
And that's all the wins since anyone's ever heard of Colby. If you like, feel free to throw in his wins over legends Max Griffin or Mike Pyle, if you feel like that helps for some reason.