There are bug free Godot games, is there anything to suggest that it's the engine rather than the devs using it?I can't remember a single Godot game that wasn't a mess in one way or the other. Why do people even use it, genuinely?
Like this dev porting the game to a different engine in the middle of the project. Realistically that would be a mess whether you were going from Unity to Godot or vice versa, or even Unity to UE etc. I really doubt that the bugs and performance regressions that have appeared in this game since it was ported are engine level issues.
Godot is also free with no revenue sharing so you probably get a higher percentage of devs on a limited budget cutting corners on costs, and it's open source anyway so if there is a bug you can just... fix it.