This is a good summary on the forum about it being very surface level for a "Complete 2D course": https://community.gamedev.tv/t/pretty-disappointed-with-the-scope-of-complete-godot-4-game-developer-2d/232289

The Unity courses felt more like an educational experience, taking you through more concepts in a really clear manner where you do feel like you understand what you're doing. There are more projects that are tailored to demonstrate concepts which are clearly outlined and shown why you are writing this code in this manner, potential alternatives (and opinions on which to use) and the logic behind C#. By the last project, I found myself totally customising the platformer. I added a robust weapons system, different enemies, and a scoring system.

The Godot course is much, much shorter and the things the instructor chooses to focus on feels more like basic maths/general logic instead of why you're typing what you're typing. I tried modifying the last project (only 3 projects long and not exactly complex) and simply didn't have the tools to add an effective singleton (which is only ever mentioned once, right at the end, never by name, and only in the context of having continuous music).