Can't load any maps without locking up.

Got to the point where I completely wiped my old Garry’s Mod installation to install it clean. I disabled every addon and turned down the graphics to the lowest settings. Even then, when I load a map, it gets completely nonresponsive. The only way to close it is with the task manager. It doesn’t leave any crashdumps behind.
I honestly have no clue what to do now.

What part of the loading does it become unresponsive on?

The progress bar gets to the end and then the screen tends to turn white after that. At the moment I’m unsubscribing from every single addon to see if that helps.

Well what a wonder nuking about thirteen gigabytes of addons did for fixing things. Re-subscribing 4-5 at a time. If anybody else has to, I recommend saving a list.