As the title says, I can't even connect to a 1v1 game, the scenario is that I am able to search a match and when I connect and pick my character, it says my OPPONENT
left and leaves my with an AI bot to play with.

I thought in the beginning that the opponent had the problem but when i went to 4v4 all players besides me crashed suddenly so I understood that it was the problem with my connection.

My NAT is open btw

I tried already to reset my router and my computer several times.

Sorry for some grammar mistakes English is not my native language.