Sorry to hear about the frustrations. Like a lot of other folks have mentioned, big cuts of meat hit the stall and if you have folks coming over for food it can be very frustrating. I've had my share of problems. My MES can be all over the place, and the cold smoker attachment can give me issues too. I've even have my maverick die half way through a smoke and no batteries in the house to fix them.
Although it can be a frustrating hobby, it packs one heck of a reward at the end. I've had more success than failures in the 18 months I've been doing it. I made chicken one time that came out tougher than leather with a big group of hungry people. They ate it but I felt terrible. I made some fatties, that people told me that would pay me to make for them in the future. The good comes with the bad.
The important part it is to enjoy what you're doing. Open up a cold beer (Old Rasputin is a good choice), throw some wood chips in the burner and try to enjoy the outcome. It's a constant learning curve and as you come across each challenge, you know how to beat it in the future.
Cheers & Happy Smokin',