I hear you. Feeling the same - I'm sure there are a lot of us feeling the same. I never went into it with any delusions of a shiney jet job straight after training, took me three years (was working full time) and been working on my FIC for nearly a year now due to numerous delays and there are no jobs, not even for flight instructors (which were in need when I started training originally).
Sick to death of office work, so I'm frantically trying to finish my FIC so I can get applying for all FI jobs (IR expired and no MCC) so no chance of any airline work in the near future. So for the forseeable future I've applied to be cabin crew which I'm sure I'll love doing, and at the same time get some good experience and have fun.
Think we just have to stick with it, and not dwell on the cost. I've spent about the same (none of of mummy's unfortunately) and I'm pretty broke, but I try not to get too down about it. Just keep telling yourself "it'll soon pick up".