Having loads of connection issues in ranked matchmaking. Who is to blame?

Hey guys, first post over here.

I only recently started playing ranked and I'm having lots of connection issues. I've got FTTH and everything works flawlessly except for Age of Empires. Any leads? My friends are getting tired of me cursing over Discord.

How the heck do I fix this? Do I need to tracert and see where this fails? Get a good proxy? What the hell is going on. I'm fucking furious, this is the only game where it happens. Don't they have enough resources, isn't this hosted on Azure? This is the only game where I'm having issues.