multiple ps5 and having lag/packet loss

Hi all,
New to this forum, I quickly did a search and found this site, anyway I need some help. I'm currently having issues with ping and lag at home when playing call of duty warzone. I have standard spectrum equipment with 300 mbps. (no fiber in our area) I have 3 ps5's that are occupied by myself and two son's which we all pretty much play at the same time. I also have a daughter and a wife whom love to stream while I'm trying to get my gaming on. lol I'm looking to purchase a router that would help my lag and packet loss while playing and still be able to fill the needs of my family members. Open to suggestions and I'm not tech savy. Any help will be appreciated.

Thanks!