Haven't Gotten Into a Game Since Patch. Advice?

Before the most recent patch I actually had no trouble finding matches. I was experiencing bad lag in many matches as well as party issues and campaign freezing but at least I could get into matches. Simce the most recent patch i havent gotten into a single game. My NAT is open and ive done a hard reboot a couple times. Im getting pretty frustrated, does anyone have any advice on what I could do on my end to potentially I improve matchmaking?