Are you a vegetarian? Eating all the meat is killing karma. If you often eat meat, eggs and fish, you kill things every day. Buddha said: Kill your heart, but dust will not come out. If you keep killing karma, you will never get rid of six kinds of troubles and pains.
Feeding ants is not giving, giving is giving up greed. Do you feel less greedy after feeding the ants?
It's best not to listen to some people's fallacies. It doesn't matter if you are confused about eating meat.