Thankfully, I never labored under the misconception that having a child would fix any number of things wrong with myself or my relationships. On the contrary, I sort of anticipated the job to be a pressure cooker of sorts, heating things up and refining them, burning away the inessential.
The awareness doesn't change the reality though, and parenting has proven full of all the same minefields, just in new sweaters. Body image, success, busyness, beauty, patience, etc. The same cast of characters swirls around the edges, popping up in my reactions to things, or in questions my kids ask.
I'm not sure it's helpful or even accurate to look for things to blame, as is common and popular these days: social media or other parents, blah blah blah.... at the end of the day, parenting is hard work and if you're insecure, you'll have to deal with that too.
Sending light and love to everyone in the trenches!