My younger brother (the closest humans get to being totally carnivorous) always says that he IS concerned about animal welfare, and he WOULD go vego, except he doesn't like enough vegetables.How lame is that. He doesn't like enough because he's never willing to try them.

If someone *wants* to stop eating meat, they will .. even if they don't like vegetables! You should let him know that in this day and age, it's possible to go veg without eating just salad

I know a vegan who calles himself a "vegetarian carnivore", because he too, doesn't like vegetables. Whilst it's not the healthiest diet in the world, he eats a lot of faux meats like veggie dogs, seitan, veggie nuggets, etc.
Maybe if you disguise some vegetables in some recipes that he enjoys that woud be a good way to show him that vegetarians don't just eat lettuce and boiled vegetables!
Wanting to change is the first step in actual change. Some people just need extra help taking the next step. Good luck