When you look at that fish you think they only need a tiny bowl, right? They live in a cup at the store you bought them at, so a slightly bigger bowl, feeding little pellets every few days and changing water if you remember is perfectly healthy, isn't it? Sadly, it's not, but pet stores make you think otherwise so they make more money. You wouldn't be so inclined to buy a betta if you knew they need supplies that range from fifty to a hundred dollars, at least in Canada.
While the title gives the idea I was diagnosed recently, that is far from the case. I have been more or less in denial for nearly five years.