You will die from veganism.
Myelin surrounds all of your nerves, exactly the same as the plastic insulation on a wire. And this is formed only from animal fat. Your brain is also made from this. Over time, the myelin will be degraded and will not be able to repair itself and you will end up having serous nerve problems.
Another problem is Vitamin B, which is impossible to find in a vegan diet. The vegan excuse is there are a couple rare kinds of bacteria that live in dirt and produce vitamin B, so eating dirt on unwashed vegetables will give vitamin B. Don't eat dirt, it would give you parasites and it would not give any vitamin B. Vitamin B is used in the mitochondria in your cells in producing ATP which is the source of energy for every cell in your body. Without vitamin B, this system shuts down and your cells are unable to generate or use any energy and this eventually kills people. Taking vitamin B pills does not work because like all other vitamins that come in a pill, they are not the real thing. These vitamin pills are synthetic chemicals made in a lab which are similar to the actual vitamin, but they are incomplete and they are lacking a lot of other parts that the real natural form contains. With any synthetic vitamin pill, it is best to consume it together with a real natural source of the same vitamin. Like taking a vitamin C pill with some orange juice. Because the synthetic vitamin that is only one small piece requires other parts from the natural source for it to work. If you take vitamin B pills when you have a severe vitamin B deficiency, it will not work because you do not have any of the other parts of the real natural vitamin B for it to use. So what happens is eventually people start getting vitamin B injections from a hospital, and this helps for some time. But even this is not the natural form and after some time the injections also stop helping. Severe vitamin B deficiency does lead to death.
Another thing is calcium. Vegans say that some dark grean leaves contain calcium. This is true, but the molecule that the calcium is contained in is a form that we are not able to break down or digest. So the calcium in those leaves just passes through digestion without ever being absorbed.
I agree with you about factory farming. So get food from a place that does not do factory farming. Grass fed beef, not the factory farmed sick cows eating corn that they can't digest. Or if you don't eat beef, eat other things. Eat fish, eat eggs, eat cheese and drink milk. There are sources of all of the animal nutrients that you require that don't involve any factory farming or cruelty. There is no reason not to eat eggs and fishes and milk, and these will have the nutrients that you need.
You are allowed to make any choice you want. But you are required to learn and be informed to know what you are really choosing. The Gods do not want you to starve yourself, so you will be educated why it is a bad idea.