If you want to be disgusted by Red Meat to lower your consumption of Red Meat, just think that Red Meat is red because it is full of Blood, disgusting idea isn't it?
Personally, I like it as rare as I can eat it without being sick. I wouldn't mind blood in my food so long as I could know it wasn't contaminated.
But why would you want to make yourself disgusted by something you like? It's good to eat meat, it's a necessary part of our diet. Vegans and vegetarians have a lot of issues with health and often have to take a ton of supplements to get the nutrients you should be getting from a normal diet. All carnivores and omnivores eat other animals, and fear about hurting them doesn't cross their minds, because it's necessary for survival.