Was in contact with @EA_Aljo before about this issue a couple of weeks ago, it seems to get worse (Xbox One Series X, Germany). Over the holidays I took my Xbox One to my relatives (1 Gbit wired connection) and I was relegated to Rivals Divison 2 because of the terrible connection, I either won so that my opponent quit (bad connection for him?) or I lost because my opponent had a visible advantage (faster or more agile gameplay) while I had the "fat man lag".
The worst thing about the new "online search setting" is that I have to play against all those guys I blocked before due to the bad connection, <20ms is most of the time unplayable, you can just tell that you have a disadvantage even with several synergies activated. I think that the European Top 100 players on the Xbox HUT Champions Leaderboard are all good players but they all have a connection advantage (especially the guys from Eastern Europe) because I played most of them. Bottom line is, HUT Rivals as well as HUT Champions is basically unplayable for me, you have to adjust to the connect, not to your opponent. Sometimes you can forecheck aggressively and sometimes you can't because you are too slow. And if you are too slow than good luck beating someone playing the trap. You can still win but it takes the fun out of it because you know that it's not fair.
As someone who has played the NHL Series since 08, I am 100% convinced that the problem is the EA server and not my connection. The ping setting in the game is bugged and not an indicator whether the overall connection is good or bad.
And I still don't know why this issue it not escalated by @EA_Aljo, there are plenty of people complaining, what is the problem for somebody from EA to check server/network connections in Central + Eastern Europe?
There are plenty of people who are upset about this problem and I am convinced that there are people who just quit playing NHL with the same problem and without voicing their discontent.