I concur - it seems to me like a lot of parenting is about competitive misery.
Not pregnant yet - 'you never know love until you have a baby'
You get pregnant - 'oh it's SO HARD, it's the hardest thing you'll ever do'
Birth - 'first babies always take weeks to birth' or 'oh a csection isn't really like giving birth, you lucked out'
Breastfeeding - 'you need to sit under your baby for 18 hours a day for fifteen years, you won't be able to move from the sofa for months'
Sleep - 'you'll never sleep again'
Fun - 'you'll never do anything you like again'
Leaving the house - 'you'll never be on time again'
Washing - 'oh I'm lucky if I have time to shower'
And if you dare to suggest that you are finding any part of parenting enjoyable or your baby is sleeping reasonably... 'oh just wait, enjoy it while it lasts'.
Sorry I digress, but I'm with you OP some people's insistence on how awful everything is and how they had it worse than anyone else in the history of mankind really can grind your gears!