I've made substantive changes to either little known but contentious or moderately well known pages - and my changes largely persisted.
Technical communities also value professional credentials and prestige as a blockbuster, so it may be helpful to reveal your professional achievements.
Wikipedia generally does not (if anything it would probably count against you as most people who bring that sort of thing up are lying about them anyways).
Sometimes people are unfairly reverted, but often people are reverted for good reason and have problems accepting that their edit simply was not a positive change to the page.
That being said.
Wikipedia isn't the truth. I know this for a fact, because there are historical articles that I was there to witness that are not even close to being documented correctly by Wikipedia.
Wikipedia simply collates narratives that can be drawn from citable evidence. Still, their definition of citable evidence is about as workable as I can imagine.
If one doesn't like it, one is invited to get your side of the story published in a reputable source, and then cited. It outsources the process of fact-checking to the free press, such as it exists on the internet.
There is a clip from Aaron Sorkin's The Newsroom that humorously illustrates[0].
[0] https://youtu.be/3wla-vK4Buw
I still think Wikipedia is better than we probably deserve and I'm glad we are training training AI on it. I also hope that they are trained on the edit discussions, because that is the AI that's going to really understand humanity.
This is likely similar to the force that keeps StackOverflow from growing and staying useful. StackOverflow is basically "Answers to programming questions as if it were still 2009" because any new content gets quickly removed as "duplicate" of content that existed a decade ago.
I've seen the same thing happen on OpenStreetMap. You make an edit, and some old-timer comes in and just reverts it. I even once got an angry message there where someone "claimed" an area in a city for himself.
I'm not a Redditor, but I understand Reddit has similar problems with mods.
Not sure the solution. It's hard to develop a community of passionate volunteers, but every time a platform does build this community up, the content calcifies under an inflexible cabal of power-mad volunteers.
I'm sorry this happened to you. Usually, edits are only reverted if the are 'bad', e.g. the one edit I reverted this morning, where a user added some buildings in India and some buildings in the ocean close to Greenland; https://www.openstreetmap.org/changeset/136040657
If you've copied data from another map into OpenStreetMap this might also be a cause for a revert, otherwise `some old-timer` should absolutely not revert your edit. Do you care to link us to the edit that was reverted and to the user that sent you an angry message, because such things should not happen in our community! (If desired, you can also message me thought the internal OSM messaging system, same username).
Every time I have tried to edit anything in Wikipedia I have run into a very ego-driven community of long-term editors who don't much care for outsiders playing in their sandbox. The levels of "proof" and "citation" demanded to make even the smallest correction, often far beyond anything backing the preexisting copy, means only those with ego-driven determination are likely to have their edits stick. I do care a little that a wikipedia article is incorrect about a topic related to my profession. But I don't care enough to engage some armchair lawyer/soldier in an epic back-and-forth debate over a period of days/weeks. So I back off and just let the errors sit there.