You can make up some 'critical defects' for every tool and engine in the universe. So what game engine is perfect for an 'ambitious developer' to use?
I'm not sure if there is any example of a studio or person making their second game in Godot when their first was not, and this rare occurrence seems to me a product of the "wow this shit is just not a serious engine compared to what I was using" effect.
Games are very complicated to make and take a very long time. Any unneeded friction will compound into games not getting shipped at all most of the time. Godot is uniquely frictional outside the basic happy path.
While 3D is still in heavy development it's actually easier to build simple 2D games in Godot. You can finish a simple game before the Unity installer is finished. Game engines aren't a fixed thing either. Assuming improvements continue Godot will get easier to use and gain market share.