The one time I more-or-less completed a game for a month-long open-ended class project I absolutely loved doing it and was in a state of flow almost the whole time.

Seems to me that you "actually enjoyed" working on this specific game...

I would say that I am just "grinding" a majority of the time and in a state of flow a sizeable minority of the time

...but didn't "actually enjoy" working on these other projects.

What specifically made those experiences different? (Maybe the difference was in your mind, how you approached these projects, not in the projects themselves.) If you find out, you could try doing more of the former type.

The best part is the feeling you get when you complete something and can look upon your work with satisfaction.

Yeah, but the problem is how to get to this place. :D

Off-topic: Do you have some kind of documentation about those projects you have completed? Like a photo and a short description, somewhere on the web. Such things could be useful later in job search.