Do you remember getting that email after your recurrent training asking you for feedback? Did you fill it in? I'm gussing no. So rather than go through the proper channels of you (the customer), providing constructive feedback to the training department (the service provider) you'd rather have a whine and a moan on Pprune.
Try it, you might be surprised at the results. Trainers that have been identified as being deficient or not training the way the company expects have been themselves retrained, or in some cases removed, but it's up to you to highlight that your expectations weren't met.