I'm very sorry you feel this way. I don't know who is saying this so I cannot comment on why they are. Personally, I don't feel this way about civilians. I don't feel this way about anyone. As a medic, I worked alongside civilians, military and veterans. They were all brilliant, hardworking and put the mission first. So, try to ignore those comments.
I don't know who you are, but I think that the best thing you can do for your country is to stay out of trouble, work hard and better yourself. Do your best to be an example to those around you. This won't always be easy, but it will always be worthwhile. Also, no drunk driving! Seriously.