Gmod no longer launches at all, even after fresh reinstall

Title says what happened, in detail i joined a server, i had to download a few addons when i got onto it. When i clicked to download all addons needed (this was in a in game popup) my game immediately crashed. When trying to relaunch gmod, it instantly crashed. I ran the factory reset bat in the gmod file, still crashed. I completely reinstalled gmod , deleting it first on steam then deleting any remaining files i could find. Still crashed. Please help

Turn off Steam Cloud sync, delete your ~/common/GarrysMod/ folder, and reinstall.

[editline]15th October 2017[/editline]

Also, put -noworkshop in your command-line until you can get it to start successfully.

This worked, thank you for a quick response