Tell us how well it matches players and teams. When random players are matched into teams, do they seem fair with close overall score. When many games are available, do you find lobbies with lower ping?

• If possible, avoid joining or leaving games in-progress. Never abandon your team.
  
• Break up any "parties" of friends. Invite others to join after entering a lobby and ask others do the same for improved matches.
  
• Make sure your NAT Type is "Open" (Guide, Video)

Also...
Treyarch PC Support @PCdev_assist Twitter
Activision Support[support.activision.com], @ATVIAssist Twitter