If you do not know what you want to do it is time to do some soul searching. Try -
Voluntary work
Take a gap year/travel that can be done on a budget/few days in another city then back home and repeat
Sometimes taking a step back and stop trying, and let the stars fall into place
For all you know someone might just come knocking on your door
Some would argue you make your own luck, but they don't understand what it is like to feel like all you do is bang your head off a brick wall
Maybe you can go back to something you have all ready done, you never know
Stop underestimating yourself
Don't give up
There are doors that may have been locked before but, maybe one will open for you sooner than you think (do you play video games, opening new worlds you know, but you have to complete the level, and unfinished business before you can hop to a new realm)

Best of luck my friend. I will PM you as you are obviously well read and bright as a button. I find your posts different to many I have come across here, intriguing