oh, but they aren't going to tell YOU they don't like their kid, consider the child to be an unpleasant burden, and wish they'd never had one- they know you'll react with horror, like you are reacting here with horror and disgust at the very idea. They know it's considered "BAD" and shameful to have these feelings so they don't go around broadcasting them. They'll hide them, or quietly bring them up with someone else who might be sympathetic (not you, in other words). I wonder at your over-reaction to the very idea- perhaps you actually DO consider your child a burden, and are trying to convince yourself it isn't so?
But I have mom friends and I've NEVER EVER met a mom who considered her child a BURDEN. Usually we consider them the greatest loves of our life and any sacrifices we make for them are done without a second thought. No one "socially pressured" us to have them. A lot of our mom conversations are about how exhausted and frustrated we are, but we never consider our child a BURDEN.