That's the thing, you decided to go to several treasures rather than focusing on one. F2Ps expect to get their super rares within one year's worth of activity. You also failed to understand the range it requires to get a super rare. Like many here have said, there's a chance you will miss rares before you get your first SR.

Now this server has been active for 2.5 years but yet as f2p for 2 years, I managed to get a super rare from both GNW/Kage treasure each and almost close to the other super rare in GNW. I am not sure where you messed up besides not focusing on what you want but you had to advantage of buying seal scrolls. Now you could either learn from your mistakes or not.