The phenomenon you are referring to usually happens in areas where there is ideological or political friction. Sure, some articles can be biased, because staying perfectly factual in the middle of an active political debate or social change is difficult for most people. But in that case, there is still the option to edit the page or start a discussion.
If something is created by a community and editable by anyone, then yes, you can safely assume that certain topics will not be perfectly unbiased. But the fact that you can see the sources, edit history, and discussions that led to a given decision is already a major advantage.
Personally, I do not know a better alternative. I have a friend who told me Wikipedia is biased, so he refuses to use it. When I asked him what he uses instead, he said, completely seriously, “X is my main source of information.”