@Confusion2000 I think you are right about the account theory. Every year i have somewhat enjoyed the game and the unplayable lag has been introduced when i get to the highest divisions. It has been the same story every year and when creating an alternate account and starting from scratch the lag has been gone until i´m in the higher divisions again.
I´m 100% confident that the problem is because of Lag compensation. Having the better connection means that artificial lag is added. As i have stated in other post is that when i play on a worse connection (4G, VPN, Throttling) the input lag disappears but it can introduce regular lag. Some years ago i had a better experience playing over VPN but it was a bit shaky and i could get disconnects.
EA knows exactly what the cause is and has known all the time. They have even had public announcements where they have talked about efforts to adjust the buffer on the servers.
The bottom line is that for EA it is important that all that want to play can play the game and get matchups. Since there are far more players with "bad" connections than ones with good connections, the ones with the bad connections are of course prioritized. So for EA it does not make sense to only match you up with players with similar connection quality and it does not make sense to make the lag compensation algorithm favor the few people with good connections.
When it was P2P i could use geo-filtering to avoid opponents from certain areas and i could even avoid opponents from certain networks and it was far better even though the algorithm almost solely suggested opponents with "bad" connections and i had to wait for a long time to get matches. P2P had the problem of easy cheating though. But i prefered P2P big time, Since dedicated servers, i´m unable to compete in the higher divisions because of severe lag compensation "input delay". You see it clearly playing online VS. It does not have input delay, it can have regular lag if your opponent has a bad connection but no input delay.
Also, people tend to notice that it is worse during the times where most people are not at work and it is because of that that your opponents probably have family members streaming videos or siblings playing other games on the same connection at that time making their connections "bad".