rapid decrease of performance

Thanks everyone for your help. I really appreciate it!
You’ve helped me so much as I have no one here who would belive into any other system that my coach’s and everyone is just saying that I obviously reached my “limit” which would be really dissapointing for me. Since I’m 19 years old and training only for 9 months with appropriate system I think that I can still progress.

What should I do now? Finish the SPP and the indoor season and then start training by CF principles again?

Thanks again for your help and I’ll post a video of my run as soon as I get it.

I had no choice. I changed my training group and club because of moving into a bigger city and the club appointed me a coach who is very respected in our country (he was a coach of Matic Osovnikar, white sprinter who ran 10,13 in Osaka 2007). I just couldn’t turn him down and I hoped that his training system would work well for me.