Killer Lag

I’m not sure where to begin so I’m just going to jump right into it. Whenever I play Killer I get complaints that I lag too much or I’m lag switching in-game. My last Killer game I gave two survivors the escape sense the two other survivors DC’d right off the bat, seeing them lagging everywhere beforehand. Whenever I get near a survivor they start running in place and teleporting. I have 23.7Mbps down and 4.0Mbps up. I also have a WiFi Extender that improves my internet’s performance and no my console isn’t connected to the extender it’s connected to my router. I’ve tried changing my DNS and there was no difference in gameplay, it was still laggy playing as Killer. I even tried resetting my internet and still no changes. DBD support was no help at all. Whenever I play survivor everything runs perfectly fine and have no issues whatsoever unless the Killer is above 140 ping. The problem only occurs when I play Killer. I can’t tell if these problems are happening because of me or the game itself. Any suggestions? I play on PS4.