which got basicaly monopolized by BlockStream and Bitcoin
Can you explain this for me? Bitcoin Core is a project with dozens of people. One of the main developers of Bitcoin Core is a founder of Blockstream. And this is "monopolized"? Please, help me understand what you're thinking here.
Meanwhile, the developers of other implementations just don't bother to tell you about their business partnerships at all. Makes me sick.
Perhaps a register of interests for those working on the production infrastructure or proposing changes to the production infrastructure might be worth thinking about.