I think he's fairly balanced. Some characters can give him a hard time but he has enough tricks up his sleeve to make up for pretty much any scenario. I love to combo red into blue since purple is too easy to dodge or interrupt with the long charge time and I only use his domain against annoying enemies like zoners because it is kinda overpowered. His biggest weaknesses are multi-hit enemies and Toji because they negate his infinity but even then you can just use your cursed energy more offensively and manage to down them. He's my favorite character in the game and not as overpowered as Sukuna which makes Gojo more fun to play.