First, I'm not in the tech sector, so take what I say with a grain of salt as industries are different. That being said, in Germany that seems to be a rather good quota of returns from my experience.
Regarding the companies rejecting you right away, my experience is that a lot of times it is either some particular key word that is missing or some other little detail they don't like. Hard to tell so as I don't know which companies rejected you.
The more important question is whether these have been your dream jobs and employers. If not, just keep in mind you do not need dozens of job offers but the one you really want.
May I ask why you want to change jobs? Seems like you are rather appreciated where you are right now.
Regarding the companies rejecting you right away, my experience is that a lot of times it is either some particular key word that is missing or some other little detail they don't like. Hard to tell so as I don't know which companies rejected you.
The more important question is whether these have been your dream jobs and employers. If not, just keep in mind you do not need dozens of job offers but the one you really want.
May I ask why you want to change jobs? Seems like you are rather appreciated where you are right now.