Quit game bug?.

[trackles]

whenever i quit the game it freezes on the quit button screen and then i have to use task manager to quit,

[Mr_Bruh]

that happens to me but for like 5 seconds then it closes

[ioneepj]

Happening to me all the tíme exiting game... Strange colorfull artefakt occured and after few second game closed

[Harbinger]

Sounds to me like Steam Cloud synchronisation which updates the saved games stored on Steam's cloud servers to mirror those on your hard drive when you quit the game.

Wait longer or simply disable the feature.