I can understand your pain when you do not get what you prepare for.
I would suggest that ICAI does not care about student like you. This is harsh reality of India. You will find many people like you. ICAI is more or less interested in last 10-12 years just to do something great things which i don't understand do benefited to whom and precisely in what ways to student or industry etc...
Now, coming to quit, my personal experience and suggestion would be as CA is the degree to have better life. Don't confuse your life believing that if you are CA than only you can live good life. I have seen as well as you also must have seen that due to culture developed at ICAI (sorry to say such. however, the same is evident in kolkata paper checking case) the reputation in market is not that good which used to be some 10-12 years back.
The life is beautiful and you have scored good marks as well. so you can do many good things in life without leaving CA as doing something with long term goal for life eg. corporate job, or freelance practice with practicing CA. The harsh reality of the profession that you will find many qualified CA looking of person who can do qualified job for them.
I would definitely agree that unless you gain some expertise or knowledge you may work at some discounted consideration. But you will get the reward. Almighty will give you what you deserve forget about only degree CA.
To share about my own track, i have completed CA PE II in way back November 2009. I did my articleship with one of the finest firm in Income Tax litigation handling i.e. the firm practices beyond return filing eg. IT Appeals, ITAT appeals, assist in HC & SC appeals, assessment for Search and Raid etc. Just because of my commitment to learn things, as of now though i have not completed my CA, i am working as Finance Manager in MNC and handling finance operation for plant. I directly report to CFO. My colleagues are CAs. The only thing i compromise is some 15% to 20% package as compare to CAs working with me.
In nutshell i would tell you that one should never quit and fight in the life. You can beat any CA in India if you have courage and Good quality Knowledge. My personal request is to prepare for the next exam and fight for the best again because we need to fight battles daily. Don't be disheartened.
All the best for bright future and i wish you would definitely pass the CA exams.