From the looks of the sticker on the cup in your first pic, did you rescue them from Meijer? Meijer's Bettas are always in bad condition here. It ticks me off to see them like that and sad when I go there. I'll only buy a Betta there when I'm looking to rescue the worst off one. Her'es some pictures of my red CT, Mr. Moto which I rescued from a Meijer store near me. Due to the condition him and the others were in when I found them, I sent quite a few complaints through corporate until they did something about it. Even though you can see the infection on his head, this later lead to a serious internal infection that almost claimed his life. After I brought him back from this he suffered signs of Swim Bladder Disorder for about two months. Thankfully, within the last month, he's made a full recovery.
The night I got him:
The same Betta today: