The short version is: Godot is a slow, buggy, undocumented, untested mess, and the attitude of the people working on it ensures that it will stay that way. Defold is small, fast, excellently-documented, about as bug-free as you can hope for, and has a very helpful, professional community.
The long version is here: Anyone here who has worked with Godot?
I haven’t used Godot seriously for ages, but I did make a small test project with a recent version a couple months ago and it didn’t seem like much had changed. And I still get github notifications for issues that I reported or commented on that are still open (or got closed simply because they were old? What?!).