Either that or talk to other owners at the park about collectively shunning the problematic owner. It sounds harsh but I’ve seen this work and it’s preferable to giving up a beloved community hangout just because of one asshole.
This is relatable. In my experience, the only way to prevent is to make it literally impossible to leave for the place without bonking into the thing. Like don’t put the thing next to the door, put it in front of the door.
Generally a good approach is to try learning the rules of logic. Logic is all about proving things to be true using only facts. It can also be helpful to try some logic puzzles or riddles which can only be solved using hard logic. Note that this won’t automatically make you a better critical thinker, but it will help you exercise that muscle.
Also, it’s helpful to play devil’s advocate. If you hear someone making an argument, try to imagine how you would dispute that argument if you disagreed with it. It doesn’t matter if you actually agree or not, just imagine you did and think about what your counter argument would be. This is what high school debate teams have to do; they are given a topic and a position and have to defend their position.
It always helps to be aware of the facts, or at least of how to find facts. If you see a debate happening where you can’t tell who is right, do your own research on a site like Wikipedia and try to see what the truth is for yourself. Not every argument has a correct answer, but you will at least be able to see where each side is coming from.
The difference is that the only way of truly verifying if you are an adult on the internet is extremely privacy-invading. It’s not like at the liquor store where a clerk can just look at someone and know that they are too young to be there.