I will say Juan is exceptionally bad at public communication, and personally, I'm glad he has been working on passing the torch to other people in the project (especially since too many projects rely on The Guy Who Can Do It All). Guy is a bit confusing to follow and I tend to go to other members for info.
Now, I can be convinced that Godot has management issues. Godot 4.0 was a pie in the sky goal filled with over estimation of ability to finish things. The engine underwent a re-write to almost every system and feature. It was a development hell as when A got changed B need to be updated, when B got update C need to be fix, and so on.
But, I'm not concerned that it was "all a scam" as major mile stones did see progress. I cannot stress how incredible the work on bi-direction text was. BiDi text is hard. It was messy. It was complex and complicated. Even big engines like Unity have spent a decade getting nothing done. Additionally, I remember how rough 3.0 was and 4.0 was an even bigger leap. 4.0 was trapped in development hell, and hopefully it'll result in the Godot project learning from that trial by fire.
This forum post reads a bit like someone suffering from burn out. Even I had to clock out of following 4.0's development until the team decided to push towards release. It was a fucking slog of development. With tons of features being pushed back because it would break 3.X compatibility or couldn't get done in time for 4.0. I couldn't imagine putting the amount of time and money into Godot that they have.
Almost everyone who has been around the project for a long time has had problems with Juan. I was an early contributor in 2015/2016, but after reading some of the responses he made on Reddit I stopped contributing. I'm happy to keep using his engine for free, but I decided he's not the kind of person that deserves my contributions.