So, lately I've been playing WvW with a friend, and when it comes to a zerg, my computer just stops try to render the game and the FPS drops even reach to 0. I know it's a common problem, but hear me out.
The same friend of mine has a nVidia GTX 1650, an old GPU. I run on a AMD RX 6650 XT. When it comes to WvW, he sais he doesn't suffer from freezes or FPS drop. He also runs on a i5 (don't know the model).
I've been thinking on upgrading my setup, specially the CPU (I have a Ryzen 5 3600), and, as far as I know, GW2 tends to need better single-core performance (even with the engine upgrade). I've been also thinking on selling this GPU and buy a better AMD GPU.
Worth mentioning: I have 16GB of RAM and a SSD, where the game (among other stuff) is installed.
And this is not only on WvW. Sometimes, on Lion's Arch, the FPS drop happens too.
So I have a pretty beefy system (Ryzen 5800x3D, 6900XT...) and just to let you know Guild Wars 2 tends to run bad even on those systems in certain situations. Most of the time those are situations where a lot of players come together, WvW, Meta Events or Lions Arch in general.
What really helps is setting the Character Model Quality and Character Model Limit to low (not the lowest!) and as a killer feature also put Shadows on Low.
I don't have the feeling that I loose a lot of visual fidelity and on the other hand I gain a huge performance boost so that even heavy meta events run well above 60fps and feel a lot smoother. Maybe this helps you a little bit.
It helped a bit, I've been playing the past 2 hours, and I felt a bit of a FPS drop, but way too less than on tuesday. Now I could actually do stuff while being in a zerg.