That's because all he really has is the loin cloth. He's the Token Black Guy in this. (it's a Michael Bay movie, trust me) Dew-Rag, Loin Cloth, far and away the buffest. The rest is so senseless. Turtles wearing Jewlery and tattoos is just such a frat boy Michael Bay stupid thing it drives me insane. What ninja is going to wear restrictive jeans? A giant necklace that makes all kinds of noise? Samurai armor? Ninjas are typically not fans of Samurai... And Donnie? Can he do a flip or a highkick, can he fight in that stuff? A proton pack and skirt? I doubt it. And the stuff dangling between their legs. They all have a foot long thing dangling, a loin cloth, mike's pants. Euphemisms for d!cks much Michael Bay?
People will defend it because they had a Leo in a firefighter outfit figure or some gimmick as a kid but thats all it was. A gimmick. No TMNT has ever had those gimmick outfits as their main apparel because it makes zero sense in a combat situation.