The server performance is often absolutely awful and can lead to a terrible game experience a lot of the time.
These problems seem to vary per reigion, I'm not sure why but the devs are looking into it.
The server hardware is good, it's high quality and the service used is AWS (Amazon Web Services).
Unfortunately due to several factors, the most contributing factor according to the developers being a core bug in the Unreal engine code which causes the game server(s) to believe its being DDOS'd. This leads to the server dropping large amounts of packets, performance becomes terrible.
This is a known issue, the developers have been looking into it non-stop for the last month or so since it originally surfaced. They've made Unreal aware of the bug and the PUBG are continuing to investigate ways to fix the server performance issues directly related to this bug, as well as deploy further optimisations to game code to help server performance.
You've got every right to discuss this issue on the forums, I'm glad you do and I hope you continue to but I ask respectfully for you to please treat others with respect whilst doing so - including forum users, staff and the PUBG team.
We're all facing the same issue and it sucks for all of us. None of us want a game plagued by poor performance and if it was as easy as upgrading servers, I can assure you that would have been done but unfortunately that isn't a solution to this particular problem.
PUBG are actively hiring more staff, including developers and I believe network engineers. They've just acquired more than a dozen new staff members who will join them in Seoul, Korea and are still looking for new talent suitable to join the team.
TLDR:
I don't want to silence you, but I do want you to post in a respectful manner and understand that these problems relating to the games network performance are real.
They're awful, they're not being understated and they are acknowledged by the developers and they're actively working on sorting out these potentially game breaking performance issues.