Other player's graph's won't be of much use to you, except letting you know how they're doing. Everyone will have downswings, upswings, and straight lines.Your different playing styles combined with the different types of players each of you play combined with the good luck/bad luck/good run of cards/bad run of cards against these players combined with the different stakes makes it worse than comparing flavors of apples to oranges.
Since the rake is constantly eating away at everyones chips, you need to be very profitable in a short amount of time and play very weak, predictable, and exploitable players, basically exercising table selection, which is not always guaranteed to be profitable, as you won't always get the right cards/situational flops against them or get outdrawn a whole lot.
The only way to answer your first question is to analyze your own hand histories. Study key pots, find leaks where you're calling too much when you're beat or have bad implied odds
, look for ways to improve the amount of chips you can get your opponent to put in on every street, etc.