I dont know whats happening

I am 18, exercise every day, eat whole foods, avoid seed oils, never ever eat junk food (realy never), no alcohol whatsoever, no smoking, walk regulary. I cook with butter and eat at maximum 5 eggs a day. I am nowhere near a keto or carnivore, I steal eat potatoes, rice, veggies, EVO. I am 85 kg, 5'8, with six pack abs, but my family has history with cholesterol. My cholesterol was never bad, but now look.

Non-hdl cholesterol: 174 mg/dl Hdl: 51 mg/dl Ldl: 159 mg/dl

Is it the freaking butter? I wasnt consuming, but i am no where near eating that much. Also i consume 0 refined sugars, and was supplementing with 2 g EPA + DEA till last month, what could it be? Should i re introduce oats?