Betta Fish: Goodbye skulls

I had my lil guy for 3 ish years, so I'm glad he got a full life, but he was in pain for days and I wish I had the strangth to euthanize him earlier, was just hoping he'd get better if i kept up the water changes, methelayne blue bathes and stuff but he didn't, was nipping his fins and was stressed, rest in peace my lil old man hes buried in my backyard, cuz my dad wanted to flush him… I love him hope hes in a better place
First photo a year ago during a tank change the last one a few weeks before. he nicked his head off his lil hut, I gave him a salt bath kinda helped.