I understand your feeling.
This is my first series ever to feel this amount of disappointment. But you know, I created an illusion on myself to think this series isn't flawed or rather, things always done good. I remember when Kakashi has MS and Susanoo, I had a real hard time to swallow that. It's like a moment that we all reminded the stupidity that the series has gone to. Yes, there were plenty coming by but that one is like something you had no idea to defend it. It felt so out of place.
I know you'll be able to move on. I have but I can stil talk about it because well, turns out I'm not the only one feeling this. Fanfic a does sound good, because Kishi sure can make fanfic look so much credible in comparison.
At the end of the second part of the chunin there were 20 genin left. To which the proctors decided that was too many and decided to cut that number in half. Meaning only about ten contestants are even let in to the final. Even if all those contestants passed that would mean only 20 contestants a year could become chuunin.
Now later on we are supposed to believe that there are over 80000 ninja just in the 5 main villages. Given 50 years without any chunin dieing or being promoted that only leaves around 1000 chunin, yet we are supposed to believe that this is the most common ninja rank.