Hi Blizzard dudes!
I have been running starcraft 2 fine on my old system which was Win11, 6700k intel cpu, 1070 geforce without any issues.
I have recently rebuilt my system and running win 11, intel core 7 265k, geforce 4070 ti super and have not been able to get starcraft 2 to run a custom or multiplayer game since rebuild.
I contacted support and they have provided the usual of scan and repair game files, clearing the cache, resetting all gpu etc back to default and its all been done with no positive results.
They have not been able to expand on what the errors are that im receiving so I can further try to diagnose any further.
Its a fresh new build, so all windows is up to date, all drivers are fresh and up to date, tpm is active and working fine, could you please assist so I can play again?! 
Here are are some of the error ID’s from the crashes that ive been given by the game crash.
33305130-2D6E-4BF6-BCA5-4CE2DE78E62F
27AEB832-6EF8-46A0-AD70-50C7115C94ED
A8269DCA-6125-489E-96C0-0B1754349FF7
32C40E46-ADA2-4B7C-9D31-DDF8A6223520
Also - I have tried creating a second battlenet account and nothing changes.
And single player / campaign mode launches and works fine. This seems to be just related to multiplayer / custom map mode.
Thank you!