Has anyone actually been able to provide a legit and good argument why you should not eat meat? And no, I'm not asking why veganism is good, and I don't care about it, I just wanna know what's BAD with eating meat. And no bullshit "it's bad for you", constructive arguments.
There's no definitive answer to that, since it is in many ways subjective. Common reasons not to eat meat include:
1- Ethical reasons; when someone does not believe that killing animals is an OK thing to do when there are plenty of alternatives to eat.
2- Health reasons; many people like OP do feel more energetic and less blotted after switching to a vegetarian diet.
3- Environmental and economical reasons; it takes about 10 times more ressource (plants and water) to get one calory of meat, than if someone directly eats one plant-based calory. Also, factory farming litteraly releases a huge amount of crap in our soils, and some have concerns about that polluting the water we drink. And cows produce impressive quantities of methane which is a greenhouse gaz.