I tried once or twice to edit articles but was quickly rejected by editors that usually believe they sort of "own" the content.
I've quickly become demotivated as explained in the analysis and never contributed again. Another problem is that when you think you've made an important and useful update you're never sure when someone will roll it back.
Some are spending a very big chunk of their time to make sure articles stay as they wish to. Being a former or an active editor on an article is not always related to how much you know about the topic but Wikipedia favorites the biggest editors. There is very little chance to convince if you're new unless you commit to spend a lot of your valuable time contributing which is not possible for everyone and not a good idea for most.
A very hard problem to solve.
Wikipedia is still great though with no real better alternative.
Some are spending a very big chunk of their time to make sure articles stay as they wish to. Being a former or an active editor on an article is not always related to how much you know about the topic but Wikipedia favorites the biggest editors. There is very little chance to convince if you're new unless you commit to spend a lot of your valuable time contributing which is not possible for everyone and not a good idea for most.
A very hard problem to solve.
Wikipedia is still great though with no real better alternative.