Izuku never gets one for all. Events play out as normal, until instead of all might giving Izuku his quirk, he scold him for being reckless.
Mirio get ofa
Izuku, instead of letting all might's words get to him, goes to train at a dojo. Kendo's dojo.
Assmight
Normal family = just inko who is kind
Or
Rude family = inko is a hero, and is married to all might, and Izumi is there golden child, Izuku is neglected. Inko teaches with all might.
Kendo x Izuku
Or
Izuku x harem
Events play out the same with a few differences.
Dadzawa teaches Izuku with after school lesson when he gets into UA so Izuku can get better.
If normal family aizawa only is caring, but it doesn't go further than that.
If rude family aizawa adopts Izuku after learning about his terrible home life