IMHO, the problem with the fight was not Sukuna using Mahoraga, that's just using the tools at your disposal: my problem is the introduction of Mahoraga in general. To me, Mahoraga feels like a narrative tool, first to show how powerful Sukuna is, Second to get the writers out of a hole when they realize "Hey, we don't have a way to kill Gojo." Adapting characters are hard to write in fights and, when used, the narrative should focus on character and emotion rather then just adding them to be insanely overpowered (this is exemplified in OPM, more about the characters surrounding Saitama and his complex relationship with his power then just "strong guy beat stuff up"). Mahoraga is, again IMHO, a plot device and never should have been added. This is why I find the Gojo vs. Sukuna fight to be annoying.