What is your most hated Garrysmod bug/issue/problem?

[Psycommu]

Updates breaking things.

A few months back an update killed my entire Wire Mod. Well, almost all of it. I couldn't see screens because they only came up green and blank. E2 wouldn't work. I couldn't edit button values/etc. So many LUA errors it would drop me to below 5 FPS. I dealt with it for weeks before I tried to fix it. Eventually the only thing that would work to fix it was wiping my entire Gmod folder (uninstalling and reinstalling did nothing) and installing from scratch. It caused a lot of folders to go missing and a few things don't work right till this day, but it fixed it.

[Sca.wingShade]

Crashing at map load.....WHEN ATTEMPTING TO LOAD ANY MAP.:(

[Angelsaur]

Too unoptimized in some maps/situations, crashes easily even on superb computers.

[Deri102]

Random crashes. Definitely

[ytr191]

Lag and Updates

[Mr. Massacre]

"derp derp derp you noclipped 3 feet out of the map increase vertex buffer size terp tiddly dum derp."

[Evil_Intentions]

I have to aggree with the "must have CS:S" i hate error casings on my dear sister swep ;-;