Hello Postal1982,
I wish to apologize for the inappropriate comments made by the other community members in this thread. They are rude and inappropriate. They also do not take into the account for the various problems that can go wrong with trying to connect to any online game. They may be frustrated with having leavers in their own Competitive matches, but that does not excuse the behavior they demonstrated in this thread.
For you though, I must implore that you understand that there can be disconnection problems that occur from your ISP to the game server. The internet is a big giant network and your connection goes through a variety of hubs before it reaches the game server. This is why your fiber optic internet connection doesn’t disconnect sometimes from services like Twitch or another game server. This can also be very frustrating to troubleshoot to what is going wrong. You can troubleshoot this through a procedure like a WinMTR test and if you need help you can post in the Technical Support forum for additional assistance from a forum MVP like me or Blizzard’s technical support.
Understand that penalties still apply regardless for the reason of the disconnection or technical issue. When you first encounter such an issue, you need to stop playing Competitive Play entirely and try to troubleshoot in less critical modes like Custom Game where penalties will not apply. You can learn about Blizzard’s policy about Competitive Penalties here.
I know this is not necessarily fixing the situation directly, but hopefully, this gives you a good idea of what to do when disconnections like this happens. Cheers.