Alright, I'll check for corrupted files and directx checkups, but until I tried this map, everything was running so fast and smoothly I had no need for a dedicated GPU and the integrated processors were working perfectly, so why would the whole game go from seamless high-speed performance to what it is now just by logging onto a laggy map?
I don't deny that something else may be the cause, but the fact remains that this all started the instant I tried to play this map.
I recently downloaded directx directly from Microsoft. How do I make sure 11 is running instead of 12?
UPDATE: it seems that the windows system updated itself after I downloaded 11 and the game is still slow.