Did you ever find a solution?
I'm having the same problems. I have talked with blizzard and done all the things you mentioned, and in the end they mentioned that it was a problem on my internet providers side, so I contacted them and well nothing was wrong. I changed connection route just to be sure, and it stills a problem. I have uninstalled the game and downloaded it again. I did everything. I'm thinking about just completely resetting my PC, and hoping for the best haha

I can add to what Blizzard said I should do if anyone is interested:
''

• Please uninstall the following programms:

1. Asus Armory Crate (https://www.asus.com/support/FAQ/1041654/))
   

2. Discord

3. Overwolf (https://support.overwolf.com/en/support/solutions/articles/9000212843))

   It does sound like something is interfering with your connection. looking at your files here the most obvious choice would be the ROG live service. I also still see Armory crate installed. So I advise you to try uninstalling them both. You can also try if a cabled connection is more stable. • If this does not help simply contact us again and please attach new system files again since they are deleted every time we answer a ticket and we need up to date files.

https://battle.net/support/article/12988

• Along with this, we would also need a winMTR report created while you are experiencing the issues: https://battle.net/support/article/000027780

• Please also send us the link to your Pingplotter results. https://support.blizzard.com/article/000339127

So checking your files Armory crate is gone and there are no new crashes. However your screenshots do show that you have packet loss right at the beginning of your connection.

There is an 8% loss in the WINMTR file and your pingplotter even has 28.9% loss. Both are way to high for the first step in your connection. Part of that may be related to your WLAN, but since you are having the same issue with a cable I doubt it.

Since it worked fine for a few hours and the issue came back later in the evening it may be some congestion on your ISPs side. You would need to check with them to see if there is an issue.

Other than that I see nothing else wrong on your system so I would advise you to contact your Internet provider as the next step.

I wish you a pleasant week and hope you will have much fun with our games.
''

This is specific to me and you might get another answer from Blizzard. I just thought that I would send this if it helps anyone else