So I keep having slow or no internet I need help! m9 one port has internet in it then I have two more I need to set up also have printer and computer and security cameras I need to plug in to work wha

I've pretty much givin up on my Deco M9 Plus at this point. Talked to support a couple times and have only gotten generic responses that haven't helped. Figured I'd throw a last ditch post on here bef