I'm on 52mbps fibre and, if connection based match making is still active, it is useless as all matches are full of laggy red bar game ruining pain in the arse immune teleporting arse hats!
Just look at these wall piercing bullets this guy has!
https://youtu.be/lR7kMA2kVV0
I have no idea how it is works, but during IB I would have rounds where I would lose round after round. I ended up with 5 coins and still loosing matches... even if I killed more than I normally do. I still think there is less people playing, so the chances of having a bad match have increased. Or it could be match making is driving people away.