I started competitive and after 1 min i got disconnected from from game and blizzard launcher sayd that cant connect me after 2 mins everythink okay but i lost sr and got banned from competitive.With my internet was everythink fine i checked after disconnect youtube and other sites to make sure its not my connection.
From Common Technical Issues and Solutions :
Why can I stream or download from other sites without issues but have problems in Blizzard games?
Streaming services have the ability to buffer information. This means that they give your computer data before you see it, often 30 seconds or even minutes before you need to look at it. Online games on a 'live server’ need to send and receive data immediately so that you can react to it immediately.
A direct download can be interrupted by a connection issue, then pick back up when your connection returns to normal. Our games will try to do this, but if you disconnect for too long, you will be fully dropped from the servers.
Keep in mind that anything that takes up bandwidth can cause game connection issues or make them worse. We suggest playing with as few other applications running as possible for the best experience.
Next steps:
Connection, Installation, or Voice Chat problems include this as well:
Some WinMTR tests to the Overwatch server you’re playing on. If you can’t log into the game, you can use the generic overwatch login server IP for your region. Otherwise, run these tests while the problem is actively happening. If you catch a disconnection or latency issue with the test, it will make it easier for us to find the problem.