So that's exactly the point. One might rationally understand the flaws with meat, but taste, however it may be acquired, is difficult to change. I absolutely love meat but not exclusively. I also eat a lot of pinto and black beans and cook chick peas. However, none of the current options come close to offering the taste, texture and variety that comes with meat. And there are so many varieties! Meat from pigs, cows, goat, sheep/lamb, chicken, duck, turkey... they all have a unique taste. They change flavor and texture considerably depending on cooking style. You can cook them in different ways...essentially, meat offers much variety not offered currently by vegetarian substitutes.

Same thing a person grown on vegetables and fruits might say. Thousands of choices, all different in textures and tastes and can be combined into extremely delicious meals.

The quality of life is subjective and taste can easily be acquired in a way that one can continue feeling satisfied with the foods they eat.

What you might need is a tastebud reset, which can easily be accomplished and after that you'll find anything extremely delicious.

You mentioned that you've just tried an ingredient and didn't like it which isn't even comparable to your dietary regime which was filled with meat during an extremely long period of time. To acquire taste takes effort or some out of the ordinary measures (a week or two of one ingredient diet to reset the taste buds, or that alchohol trick repetatively etc.).