Constant disconnecting/lag in Halo 5 MP

I was sent over to this forum by xbox support with the Service Reference Number 1322313727. I experience near constant lag with people just walking in to walls more often than not when I play halo 5. These connection issues only happen on Master Chief Collection last year and Halo 5 this year. All other devices in my house work perfectly fine. Optimum is my ISP which I’m reading might be a problem with the dedicated servers. I’m really just looking for any possible solutions because I’ve tried all of these common suggestions (Port Forwarding, new router, Etc.)