Your line attenuation isn't high and won't vary as it is a measure of your distance from the cabinet. Noise margin is high as you are on an Infinity 1 product capped at 10/55 and have plenty of headroom for higher speeds.
Your broadband speed is targeted to be the highest achievable with a 6dB margin. However, as your speed is already artificially capped at 10/55 due to being on an Infinity 1 product, the speed can go no higher thus your noise margin is higher. If you were on an Infinity 2 product (20/80) then your speed would increase to approx 61M and your noise margin reduce commensurately.
Why are you concerned about noise margin? Presumably you are concerned about speed, if so moving to Infinity2 would give you a slight increase to about 61M and give you a noise margin of 6dB which you would probably not notice in the real world.
I am trying concerned because when playing video games it doesn't feel right online and looking for anything that could be causing issues.
what doesn't feel right? Are you seeing obvious lag?