If you want a general article, especially a political one, good luck. But if you're looking for some kind of hardware/software information, or details about a problem or algorithm, it's very good.
I'm not an expert on many things, but I've corrected factual errors where I've seen them. Most of my edits are to link together two pages that were, for whatever reason, not properly associated.
I long ago stopped contributing to wikipedia, its written by an ever reducing group of people who are not only uncivil but also quite often delusional. The system its designed has excluded normal people.
I hear this criticism a lot, and it's usually about something subjective like politics or biographies.
Was frustrating to read about but it follows issues I have had trying to fix problems in some technology articles as well. Its not just an issue with biographies and politics there is basically a troll behind every false fact on wikipedia with power.
There is little question that an author should easily be able to correct a factual inaccuracies in a Wikipedia article which is related to them or their work, however the rights of an author to suppress mentions of reviews of their work purely because they disagree with them, are a different matter entirely.
https://en.wikipedia.org/wiki/The_Human_Stain#Anatole_Broyar...