If you check the other forum, the various complaints, a lot from HH in bug reports and such, you'll see a lot of discontent about the amount of work (or lack thereof) that was done on the Emscripten engine.
As far as I can tell the probable reason for the recent increase in complaints comes down to:
1. The company has effectively 'left' their flagship product alone and stopped any noticeable development/bug-fixing on it (not that bug-fixing was ever one of their strengths) while continuing to sell their flagship product.
Parents who spend good money sending their children to learn English at my EFL school can telephone me, Viber, Telegram, Messenger, Whatsapp, and come into the school to hash things out with me: my business would go down the pan quicker than you could say "Donald Trump" if I were suddenly no longer available for feedback and support, but continued taking their money.
2. The company is ploughing what ever energy into developing the 'next great thing'; 'CREATE'.
3. An increasing number of the posts seem to refer to people trying to do things with Android and iOS rather than desktop apps: and, particularly with iOS, this sort of work is not for the faint hearted.