Xiaomi 13T Pro HyperOS Problem!

When I first got the Xiaomi 13t Pro, it was great. I play PUBG Mobile and there were no freezes or lags at all. That was until I updated to HyperOS. After the update, the game started lagging a lot. The phone overheats excessively. It's very frustrating to have such a problem after only 4-5 months of purchasing the phone. I urgently want this issue to be resolved. I formatted the phone and deleted everything, but it didn't help. It has 512GB of storage. I paid 40k hoping to get something good, but now I only use it for making calls.