Fps crash

I enter the game and everything starts normally, but when I enter UT the game starts to lag with reduced fps and makes it impossible to play or use the menus, the game lags and when I restart the game nothing changes. I've uninstalled and reinstalled it and nothing has changed. I sent a video on TikTok showing how the game is doing.  https://www.tiktok.com/@dudely.vale/video/7554679182224067858?q=fps%20crashed%20eafc26&t=1759332804452