In the last month I improved my tactics by 300 "knowledge" points
Rating follows Knowledge
Who says that in life? Not sure if you're trying to be funny and failing miserably, or you're just stupid.
to be fair a rating is a measure of your strength. unless you are gaming the system achieving a certain rating means you improved your game to a new level. but obsessing over a rating like you said playing a ton of games to reach it instead of analyzing losses, practicing tactics, and reading up on end game theory is the wrong way to go.
A lot of chess players (I was one of them) strive to achieve a particular rating: 1600, 1800, 2000, etc. They try hard, play many games - and most of them usually don't improve much. I've seen MANY such players and been on this road myself untill I realized that it's NOT the right way.
Don't strive to achieve a rating. Strive to achieve understanding, learn patiently; ratings will follow.
As they say in life: don't chase women; chase money and women will chase you.
P.S. For me personally, I just enjoy learning chess - slowly, patiently. Learning precise maneuvers is a lot more pleasant than beating somebody in a game full of blunders.