As it currently stands, the morally correct option for food production would probably be for a large amount of the population to starve. That, of course, is also not entirely morally correct.

Considering almost 1.5 billion adults in the world are overweight it wouldn't be so bad to let some people starve.

Guess what, most if not all veggies and vegans are also doing something morally dubious at best. Factory farming, extensive farming, they’re all bad for the soil, bad for native wildlife, bad for native plants. The societal impacts of factory farming are also not small. In the end, the moral lines people draw are mostly at different places, neither is undoubtedly better than the other.

Animals needs to eat and drink too, the meat industry has the highest tool on the farming industry.

I have personally tried to give up meat twice, once for 6 months and once for a year. On both cases my health suffered massively for it, and I went back to eating meat. I had a cousin who was, for many years, a hardcore vegetarian. She was also of the opinion that eating meat was wrong. A few years ago she reintroduced fish in her diet to overcome health issues after fighting them for years. Most symptoms subsided in a handful of months. I believe she now also eats beef, although infrequently and in small quantities. I’m sorry to be that guy but reality is more complex than whatever moral line any one of us would like to draw. You’re not wrong but it would behoove you to acquire some nuance on your thoughts.

It sound like your diet was off, if you don't eat animal products you need valid alternatives to complete and balance your diet. In cultures shaped around animal products it may not be automatic or easy to find alternatives. Our ancestors diet for example had less meat and more lentils, in countries were they consume less meat you are most likely to find popular dish with other proteins sources.