Garry's Mod Freezes on main loadup screen

My gmod was working fine a couple of days ago, now when I go to start it, it loads up but freezes on the main screen where the citizin guy is holding the tool and pschics gun with the birds flying around. So I open task manager and it says the game is not responding so then I end task and it says hl2.exe is not responding so I close everything. Need help! I’ve unistalled all the games and steam before and still nothing. The -dxlevel crap dosn’t work so don’t even talk to me about it.

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