Y U No

No they are not. They're sometimes castrated and pastured to fatten them up for slaughter. Others replace aging bulls. A few become veal.

Is there an ethical or kind way to kill someone who doesn't want to die?

We're talking about an animal raised to be food. "Ripped from their mother and shot in the head" is factually incorrect. A calf is $1500+ after it spends a few years grazing. Nobody is ripping them from their mothers and shooting them in the head. Sometimes they're sold as "bottle babies", where they're hand-fed by their buyers until they start grazing....then it's the same few years of buildup.

If you don't know what you're talking about, best to keep it to yourself.

So, d'you think that the animals want to be food or see themselves as food?

That is indeed cruel to that baby, as that diet does not contain the variation of nutrients that that baby needed but that was the fault of the parents, who definitely had other issues, as well. I know quite a few vegan parents who I know would never have dreamt of giving such a young baby only apple juice and soy milk and whose kids are thriving on a balanced, varied vegan diet. Mother's breast milk would've had all the nutrients that that baby you mentioned needed at that age and then they could've followed on by feeding him a variety of plant foods. The American Dietetic Associaton and the World Health Organization agree that a balanced vegan diet is suitable for all stages of life. There are some who believe that breastfeeding isn't vegan, which is nonsense, as as a mother consents to feed her child, whereas a cow does not consent to be raped to be impregnated, have her children ripped away from her over and over again, be forced to give the milk made for her children to humans for an unnecessary reason, be painfully milked until she can't produce milk any more and then trucked to a slaughterhouse.
So, my question is are you against animal cruelty?

Tl;Dr vegans are murderers.

Just curious to know why you'd think that vegans are murderers.