Be prepared to a shock: nobody will ever reply to you if - what you ask is not mainstream - and - you are not willing to pay 50 USD / h -
Oh man, I can feel your frustration. I've been there too.
it is not fair 
No, and a lot of people are assholes, even/especially when working on free/open source stuff.
I wish I knew of a solution, but I don't.
I do know that things exacerbate as the hardware becomes rarer; I guess that is one reason why I don't use legacy hardware much.
Before the first Raspberry Pi came out, I posted on their forum that I have lots of experience putting OSes together (I was quite active on Linux from Scratch, and was very up to date on the inner workings of Linux distributions), and would like to put together a minimal Linux distro for those who wish to integrate their own solutions on top -- and got promptly banned from those forums as a dirty greedy leech; an ugly, dirty, smelly Linuxie.
I only have a Raspberry Pi Zero, and that only because I know the foundation makes a loss on each sale.
If one knows the history of the founders, and the history of Qualcomm wrt. Linux -- basically, if Linux was a person, Qualcomm would probably secretly pay criminals to rape them daily, just because they simply utterly hate the rules Linux operates under --, it is nothing surprising.
The only way to deal with this that I know, is to keep a personal secret shit list of stuff you won't help with, ever again, and why; and to try and keep oneself to forums and groups where you can contribute positively, and where your contributions are valued.
