There's plenty I can be judged on. I've been passive aggressively sworn about in the street because I have a child (then aged 6) who has absolutely refused to wear trousers for years. He was happily walking through town in the slush at 1oC with bare legs, thick coat, hat, gloves in his shorts. I battled his clothes for a long time which just made us miserable until I conceded that he hadn't had hypothermia yet, and decided it was my maternal duty to provide him with the means to dress comfortably and appropriately, but ultimately he has to feel comfortable in his body.
I get plenty of snarling in particularly on the school run, but there is a difference in a parent impatiently addressing their child's behaviour, and getting nasty and personal about it (swearing may or may not be included, it's often not the swear words that cut deep)
Inhibiting a child through not letting them play appropriately, be it excessively cautious, or silly obstructive clothing/ having to stay zealously clean does matter when a child can't learn through play or is trained to be over anxious. Again, I'm sure I've been judged; I certainly heard intakes of breath when my then 2yo went climbing and had mothers ask if he was OK, but it was safer to let him concentrate on what he was comfortable doing than to excessively helicopter him and distract. I had to catch the older sibling once, but the younger one was very agile and stable. Also inhibiting children through sexism (often entwined with homophobia) If she wants to play football, let her. If he he wants to dance, let him. Let them develop themselves, not be pigeonholed on an arbitarty stereotypical set of values.
I do judge people not parenting according to their surroundings. No I don't go to a pub to listen to fucking Peppa Pig. If I wanted Peppa Pig, I'd put it on my own TV to watch at home. Tablets have their uses, just don't inflict the noise on everyone in the surrounding area.
Wishy washy non-parenting where parents ineffectively whimper at their DC who is running feral and clearly doesn't care is not fair on other people near by and does the child no favours. Add to that the parents who think that the only person who should interact with their child is them, they tend to be ineffectual and they tend to raise children who are difficult members of society. If you don't want a teacher to deal with your child, home-school, if you don't want a staff member to address your child, don't let them run amok.
Have some consideration for your child's needs and the environment; don't ignore that they're getting bored and twitchy and order another bottle of wine. (I have walked out of the pub early at that stage as things were clearly going to get worse.
Most parents are muddling their way though and making some errors as they go, I certainly have, but there are parents out there who make little effort to meet their children's needs, including emotionally. Most parents will successfully produce children who are positive members of society even if there are plenty of little things along the way that aren't to other peoples' taste. There is a difference in judging according to taste and harm.