this doesnt make any sense, you wanna get better? put yourself in more difficult fights / situations
find friends who are better then you and do 1 v 3 (you vs a combo and (insert player here) or 1 v combo
death match is ok but it doesnt punish you, you get health everytime you kill someone, its not realistic.
if you can beat the numbers stacked against you find better players and make friends with them and continue to do the same.