I started completive programming really at start of this year but still stuck at newbie,Also I feel brain damaged .I think if I practice more,My upper limit will be specialist. I saw many people solve problems with rating 1400-1800 easily .also editorial is hard to understand or maybe I am stupid.so,should I rage quit problem solving?

it will be nice idea if people which their rating less than 1900 to be allowed to make private groups and make contest to train with their friends, colleagues. Advantages: 1. practice more and make practice more fun. 2. encourage you to solve problem faster. 3. know new ideas. 4. practice particular type of questions each contest.