Safari won't load webpages after installing Big Sur

Hey, so I updated to Big Sur and started having issues with Safari. Basically, web pages will take forever or not load at all. This only happens in Safari -I tried Firefox too, which works fine- and only when connected through wifi -I shared internet from my phone using and there was no issue either-.

Anybody has had the same problem and figured a way to solve it? I've already done the usual: Clearing the cache, deleting and readding the wifi network, rebooting the computer and even reinstalling Big Sur.