And yet having kids is wonderful.
I joked to my friend it is like Stockholm Syndrome. You have no choice. You made your bed and must now live in it. Of course you are going to enjoy your kids, it is biologically wired into you and you also have to do it, regardless of how overwhelmed every other part of your life has become because of that one decision.
It has also become very trendy in the last decade or two to devote your entire life to your kids and to never leave them alone, to invade every aspect of their day to the detriment of a parent living their own lives. Extreme detriment. Constant parental involvement. Vicariously living life through your children. It's actually fairly distressing to see adults so subservient to their children. A very modern malaise, this was not how parents acted 20 years ago.
Never trust a parent telling you having kids is great.
I am personally undecided, but I'm deadly serious, never trust a parent saying having kids is great. It's quite literally like they're some sort of possessed zombie, everything they say is basically "HELP! HELP! This is AWFUL! All joy apart from worshipping my child has been DESTROYED!". And yet they all say "Oh, it's wonderful!" in the next breath.