My Sons father dresses him very ugly should I be mad ? How should I handle this ?

we have a son who is almost teenager. He lives with dad full time and I take him out and spend time with him throughout the week. Everytime I pick up my son his dad has him wearing like thrifted vest with someone else name on them, outdated style shoes, mind you my son is very handsome, he could be a model, he’s taller than me and his short fat midget father. I feel like his father might be jealous of him or something. Things got better for me and I took my son shopping over the summer and fall, and got him some stylish chill fits that I actually studied online, and I taught him how to dress over the summer. While also taking note of what he likes. So when I pick up my son and I want to take him somewhere public and his dad sends him out looking like a stepchild no one loves it sends rage in me. Currently I’m live in care giver and I don’t store things at my place. While I’m waiting/ saving for my own place where he will have his own room and gaming area. I don’t want to start things with his dad because he is a very sensitive man.