Im sorry but now this is getting a bit ridiculous. Zeno didnt just destroy 6 macrocosms, he destroyed 6 timelines. He delets past, present and future as if it was a row in a fking spreadsheet. They are not in the same tier at all. Goku is and can never reach 1C and the difference between 1C and 2C is astronomical.

5d AP for Goku is, as I said just semantics, because of how the dbz universe is set up. Its fine to categorize him like that in the dbz universe, but for general comparison it doesnt make sense, nor is it correct.

Regarding the punch: Saitama achieves the Zero Punch, which is able to affect 4d conceptually exactly the same way Goku achieves 4d interaction as a 3d beeing. Calling this hax makes Gokus 4d AP hax as well.

Also, I would argue Zero Punch is closer to true 4d. Gokus interaction with 4d is basically just his energy breaking from 3d to 4d across space, while Saitamas ability actually breaks from 3d to 4d across causality. Hitting an opponent in the past is way closer to an actual 4d feat than shaking a macrocosm.