iMac 16,1 not working

Hi all I’ve got a 21.5K late 2015 retina iMac that has been running sonoma perfectly fine till last night then all of a sudden the performance drops crazily to the point of nearly unusable and the wallpapers stopped working and only went to white or black, I took the advice of doing the post root patches and allowed my computer to restart however once I get to the login screen I can’t even login I’ve been trying to enter recovery mode as well however I’m not having any luck any advice pls help!

submitted by /u/Seenan123
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