Bad Uplaod lag when gaming.

I've had problems with my Xbox not reacting to my commands immediately in first person shoot games.  This causes me to die over and over again in the game.  I believe the area I am in is over subscribed.  I also believe that when  my area reaches capacity that Cox prioritizes download over upload.   The game appears to run great but all my commands are delayed ms wise.  That can't be seen, but is evident in my game quality experience.  In other words I am less then effective in a game that I am proficient at.  The worst time to play is on the week-ends, evenings, and holidays.  But it is rarely good.  When it is good, I dominate the game.  When it is bad, which is most of the time, I play horribly.  It won't show up on the speed tests, but my gaming experience says it all.  Cox will come out and say maybe its this maybe its that.  Then they'll do a speed test and say it looks good.  But clearly it is not.  i see other people with the same experience.  To bad Cox is a monopoly.