Totally understand and agree with your argumentations. But, as a matter of fact, TFDi obviously is not willing or able to fix this problem.
So, to get the 717 running, we only can help ourself and can give solutions further to others.
I also do not believe that all buyers are having the same problem as, regarding the downloaded numbers of repaints, there must be thousands
of copies been sold and compared with the number of posters here there might be a big silent majority.
It also does not help anybody that other aircraft are running fine. This plane does not, and if I want to fly it I have to find solutions
within my system (hardware settings included).
About the unacceptable behaviour of the developers everything has already been said. We only can keep it in mind.