Since when did quanity go over the importance of quality.......?????
Sorry you are in a though spot.
I worked flat rate all my life, from the business end of it, quantity has always been more important than quality.
It simply costs too much to be in business today, to be there, just to give a guy a job. He has got to make you money.
If you want to stay out of the line of fire in your next job, you have to figure out how to be at least as productive as the average guy. And, if you want to be successful, you have to got to the top of the production scale.
That doesn't mean you have to be a hack. Lots of guys are productive, and produce quality work.
I often turned twice as many hours as the average guy in my business did, and my jobs never came back. It can be done.
The best thing you can do now, is focus your energy on being even better.
You don't always have to work harder, sometimes you have to learn to work smarter. That could mean quitting smoking, taking few breaks, spending less time BS'ing on the tool truck, and working through lunch occasionally, for starters. Then, continuing education to improve your skills, and your business sense.
If you did not work flat rate at you last job. Find a job that will pay you flat rate. Nothing motivates you more than seeing the day going by, and not having earned any pay. Then, you will know more about how the boss feels. Except, he can actually loose money on you for the day, because he is still paying for the building, the utilities, the insurance, and your benefits, to name a few.
Learn to work flat rate, be productive, and they will practically beg you to work for them.