Oh gosh, where do I start?
Back in 2021 it wasn’t as bad. 2022+ it started to get insane.
But generally it’s getting raided, raid, have a god on the map.
When it’s happening on any server it’s always a bit unstable of course. Multiple raids simultaneously makes it a bit worse. But it’s doable. General expectations are desynching right? You can always tell when big raids are happening on a server with ping going a bit nuts.
Mind you these are my experiences spread out. It was a gradual increase in instability - while I’m describing largely the most recent, these were issues present as that gradual. But the last 3 attempts on there couldn’t climb, couldn’t open chests and even if it eventually opened, couldn’t load inventories, putting on/off gear took forever, respawning at bedroll was always a 2 min+ wait for anything to load, couldn’t see the enemy, I was even seeing my clan mates desynch.
All clanmates and opposing clan were seeing the same things.
Never experienced this on any other server before or since and these were comparable in pop and builds. Only heard about 1540, I wouldn’t touch that one with a ten foot pole again. Sucks because 1530 is where I met a good majority of my friends 
As I mentioned earlier, a regular removed their entire build. I seriously considered the possibility that the server location had been moved. But I play with East and West coast players, same for all and the West complained more.
What’s the pop there right now since it’s raid time?
As for the 3 PVE servers, no raiding so don’t experience any lag issues due to that. But I desynch or take quite a bit to load when someone is running purges. Dying in a mob because you’re left helpless to the lag is frustrating. Then of course the known crash issues.
I don’t generally experience huge issues even loading bases though. I give it the few seconds it needs even with ginormous ones. My PC isn’t the best but it isn’t the worst. Internet isn’t my problem and can’t be with gamers in the household - husband and I ensure that.