Does everyone you're playing with (that you know) have a decent connection? Not tried 3 v 3 yet but every 1 v 1 game has been perfect.
Think it would probably limit it to europe only on the matchmaking, and would search for more local people. Is there any option to filter the strength of connection? Can't remember. Maybe there's not enough people playing 3v3 yet so it struggles to get a good connection. Surprised me that last night there were only 21,000 people on the MyClub rankings, such a small number compared with Fifa, I'm sure this will rise though, think PES2017 had well over 100k on PS4.
Only fool proof method I know of to limit to local connections in online games is to have a router that allows you to do this.