Yep, from what I’ve read, most people have connection problems.
That’s one thing players and even devs seems to forget when doing a multiplayer game. Well, not forget, for the devs is more how they underestimate how complex and hard is to get the network infrastructure part right. Having a reliant central server with redundancy, having a good scaling solution, be protected of DDoS in some way, having player servers all over the world, having a good anti-cheater solution integrated, having a report system and some kind of anti-abuse system, and of course having a good connectivity system (going around router/firewalls in a transparent manner for the user), and having a netcode with prediction and anti-lag systems.
It’s all easier said than done.