Wait, so you feel that you're a horrible game master because 2 players left the game?
If it'll improve your mood about your GM skills, I'll offer to rejoin the game.
I didn't leave because I thought you're a bad gamemaster, I left because I felt lazy in reading the events of the story.
...Perhaps I can have "finding it difficult to concentrate on what's happening" as a flaw of my character as a justification of me not reading all of the events (including backstory)?