Hi, I was in the same situation 3 years ago. I finished my fy2 and decided that enough was enough and that I couldn't take being a gp anymore. Gained my frozen atpl this year and through some luck got in with an airline, currently line training on A320.
The main difference between the professions seems to be the hours you work. As a GP I was working 8-4 everyday now there is no pattern ( I don't enjoy the hours as a pilot) and of course the money is far less but then you don't become a pilot for the money.
I do regret making the switch sometimes.....