@Tony Thanks för the answer. The problem is att an standard ps4 dont support 5g. I dident try the ps5 att the time. But an Xbox was in The wifi and No lag on the system. I have tried the settings...

i got 3 m9+ and isp 250/250 fiber and everything works great whitout lag in 15 units. But when i invinted some guys (4) to me and they bring there ps4 to play cod warzone We got some big problem.......