Constantly crashing during last step of loading in Single Player?

I’ve tried about 10 times to launch single player and it crashes to steam without any error messages each time. I’ve

  • Uninstalled all the addons I’ve downloaded since it last worked that have <1000 upvotes

  • Verified the game cache

  • Uninstalled and re-installed Gmod

  • Disabled and re-enabled all the addons

Still nothing. What do?

[editline]4th October 2014[/editline]

NVM I uninstalled some more add ons and it works (on flatgrass anyway)