Yes I know I am inexperienced, but they change so many things to the point that your experience doesn't carry over.
They changed your spawn point every now and then, and remove a few convenient disguises, and add lots of extra people in places you'd want to invade.
I have to keep Alt+F4 for like 5~10 times for some particularly difficult/changed levels. If I don't cheat that way I will keep fail and fail and fail until I have no tools/weapon whatsoever left.

IDK what exactly is wrong but the learning cliff is just too harsh. And you are even denied learning because one mistake and you are basically permadeath.

Every stage of a mission has to fail and retry like 5 times, and now I just had a client crash on my 15th try, after finally killing the first guy (and then immediately got compromised because someone decided to turn head at the worst moment)