If the game "crashes" it shouldn't be with the server to do atleast, just your game and the files for it.
Just as a reminder, when reinstalling the game you must make sure you remove all the files that used to exist for FH, but also that you download new installers incase there was something wrong with them.
Now if you did do this and the game is still acting weird, I'd suggest you to try things like lowering the ingame settings to something less demanding like, lowering the view distance, lower the resolution of the game, remove Anti Aliasing, and ofcourse, try to change the rendering subsystem mode.
Restart the game and try again.
If the game worked before, a clean install should solve it though unless it was bound to the graphics settings.