Also, it's not as bad when there aren't that many people on the server. When there are 10+ players it's extremely slow. I am still not certain if that's because the server is struggling or if some player's potato computers are slowing down the game.

I can confirm this. I've played on many custom PVE servers and have come across this on each and every one. A flame turret biter defence slows the server down so much we soon after have to restart the map because it becomes unbearable. Like this: 100% simulation speed > a huge biter wave spawns and ...

Griefer names: IIIllIIIlIllllIIIIII and IIlIIlllIIIIlIIllIIIIlllllllI ( iiiLLiiiLiLLLLiiiiii and iiLiiLLLiiiiLiiLLiiiiLLLLLLLi ) https://imgur.com/a/jU1n9K5