I think you're putting words in my mouth now.
Metabolism is really not that complicated at all, it just means you need to work out more and
by extension you need to eat more. You keep saying 'eat more' is terrible advice when it's fundamentally not. It's not complete advice, but at the end of the day nobody was even giving advice, it was a random pass at a random dude online. I have fast metabolism, I understand metabolism. Metabolism or no metabolism, your gains come from your food. This is non-negotiable. You might lose it to metabolism if you don't work out, but it still comes from the food you eat.
Jesus, this is the most stupid thing I've ever argued about. You wanna bitch further, go ahead, this is a serious waste of my time over a bunch of miscommunication and semantics.