That worked until it didn’t. Feels like it’s the same thing happening from the launch of the game, but I didn’t do anything to fix it the first time.
This worked but I froze right after assemble your team. Cool 
try to turn off nvidia shadowplay since it crashed for me right when that window top right for shadowplay popped up. i guess either blizzard or nvidia has to update game/drivers
After nothing worked, I tried completely uninstalling and reinstalling the game and updating my game drivers and it was fixed. Super unhelpful but it did work
Still can’t enter the game, gets to entering game then I have to close it from task manager. Tried everything in this thread from resetting my game settings, redownloading drivers, uninstalling and reinstalling, scanning for repairs, none of it works. Would be nice to be able to actually finish the battle pass that I paid for.
I have this problem too after the update. Still can’t join games rn. I have tried the discord thing, restarting computer and reinstalling the game. None of these worked. Has anyone figured out a solution yet?
Ok I somehow just found a solution by accident. I launched the game, and the game freezes at the “Entering Game” screen as usual. Then I just waited, and eventually the game unfreezed and asked me to re-login (you know, the in game login screen that shows when you lost connection or if you afked on the menus for too long). I entered my email and password and the game now enters as normal. I don’t have the issue anymore when I close the game and launch it again.
I have this problem as well. Game is stuck on entering game and after a while waiting, it will be disconnected and prompted me to login. After entering my details again to login, the cycle repeats itself and I am still unable to enter the game.
Tried all the solution suggested by the people here but not of them worked. Only work around I found is to connect to my mobile data and play using that network but Overwatch consumed quite alot of data so this is just a temporary solution until my data ran out 
Nearly 1 year later, and this is still not resolved.
I have the exactly same problem