[Matt]

its ridiculous, i made 100 pts and 4 deaths lost more than 100

Not even possible. Maximum skill change is 50 points a kill, with victims loosing 1/4 (or 25%) of the points. Assuming all 4 of the killers got 50 points from you it would be 200 x 0.25 which would make you loose 50 points.

The point's system is completely intended this way, as the more points you get the harder you have to work to stay up top.