I started growing out my hair and my father is insulting me and everything about my haircut like heavily he says it’s what druggies look like and I’m selling he told everyone in my family I feel so embarrassed idk what to do

Absolutely block out every word he’s saying. I’m sure it looks fine and if you like it that’s all that matters. Making fun of your *kid (cause I don’t know if you’re a guy or girl; doesn’t matter in the slightest) is very weird and yes HE should feel embarrassed.

Sorry to hear this. Sounds like they're in some way threatened by you expressing yourself, like they want you to just conform and make things simpler for them. People are strange, could even be they wished they'd rebelled or been a bit different, and they told themselves they couldn't (or were told they couldn't) and now they're putting that on you. It's hard for sure, and legit you find it upsetting. Ultimately noone else can decide your life for you and good on you for trying something you'd like in the face of that. Takes guts

Honestly, i don't have that great of an advice to give you, considering he's from a different generation and most people like him find it really to difficult to move their rigid little minds, but have you tried telling him in a serious voice that this is making you feel awful, that he's hurting you? I mean, sometimes straight up honestly catches people by surprise. Although, this may also be a complete failure depending on the person you're dealing with. If this doesn't work, then theres nothing else other than talking to someone you trust and enduring this toxicity until you become of age and get to leave this house.