Oh Dear XTC.....
With you're attitiude, I doubt that you'll see another 3yrs as cabin crew....you may not find the briefings interesting enough to keep your tiny brain stimulated, however don't forget that they're are a huge percentage of F/A's in the industry that take there job seriously, and are very professional.
I just hope that you never have to use you're emergency trainig, as in my opinion you'll be woefully inadequate if you only listen to 5% of what you get asked in pre-flight briefings.