I have a really complicated relationship with FFXV because while it's an objectively pretty bad game, I enjoyed it way more than I reasonably should for a game of its quality. Maybe it was the fishing minigame.
I absolutely agree with the overambition being one of the downfalls of the game. They wanted to go too big and create some kind of multimedia "experience" where you had a movie, a novel and many many DLCs to spread the content over.
The end result is an empty shell of a game, and even after watching the movie first and pausing the main story at the appropriate points to play the DLCs (I didn't play on launch and bought the complete edition), I was still missing context and having beats not land because apparently crucial backstory was meant to be told through the Lunafreya DLC that never got released because the game did poorly.