Its not infinite.
I air break, your ****ed on 3 of the 5 neutrals cause of platforms. There, i stopped your infinite. You cant know how many inputs i did therefore you have to predict for it to be anywhere near infinite. If i ban FD, you have nowhere where its a true infinite. On MKs CP, lol, your doomed, he can go d3 or go RC/any stage which changes. On your pick, with FD banned, your only decent choice is SV so that theres a possibility he wont be on the platform when he air breaks.
Remember that by default MK air break, you need to hit with the mash when he breaks for him to ground release. Learn your stuff.
As said before, for it to be infinite you would require either insane prediction skills, or knowledge you do not possess+very good math calculations+application(in a frame context where each input is -8 frames on the grab time or so if i remember corretly, you need good math to be able to know when hes gonna grab break). Did i mention how your infinite goes slower and slower until it reaches a very slow attack rate? Leaving us thus more chances to escape?