Sometimes when users get into conflicts, other users may take sides, causing people to get away with breaking civility rules of Wikipedia.
Let's face it, everyone makes mistakes. From the most experienced editors, with over sixteen years of experience on Wikipedia, hundreds of barnstars and hundreds of thousands of edits, to a newbie, who just joined Wikipedia an hour ago. It's frustrating when people go against you for the most silly reasons ever. Maybe it's because of ageism, maybe it's because you don't have lots of experience, it can be for SO MANY REASONS.
People take the more experienced editor's side because they trust them, even sometimes if they aren't being civil, or making personal attacks. The best thing to do is tell an admin, and don't respond with any personal attacks back. It'll get you in even more trouble than you were before. I've experienced it and saw it with my own eyes, it can feel pointless and make you feel discouraged and hopeless if you're the only one getting in trouble. If you are having troubles with another editor, who seems to be quite inexperienced, don't bite the newcomers. They are likely trying to edit in good faith and not trying to hurt the Wiki.
This is a BIG problem going on in Wikipedia. Sometimes even admins take sides based on bias and end up blocking the wrong person! You should explain everything that happened, or if it's ongoing on an article, with personal attacks etc, it's best to take it to WP:ANI. Starting Wikipedia off as a younger editor, I was commonly treated worse by the more experienced editors. But here's the thing:
A elementary schooler may not be as mature or ready for Wikipedia as an adult, graduating university, and having a family and a career.
Nevertheless, treating younger editors worse than older editors IS WRONG. Kids have feelings too, and it's best not to discourage them or make them feel worse about themself. Showing them the ropes and giving tips to them is a more appropriate response. However, not ALL younger editors are here to help the Wiki. Younger editors shouldn't be given special privileges because they're younger, they should be treated as adults on Wikipedia.
In conclusion, younger editors should be treated the same as older editors, and be judged on maturity, not age.