While the site may be useful for some purposes, the site owner seems to have a particular hatred for one single cryptocurrency and dedicates much of the purpose of the site to lying about and slandering that open source project. Some people using the site for innocent purposes would likely be misled by the lies on this site.
Imagine if Mark Zuckerberg had a bad divorce and so he put a section on everyones facebook page that talks about what a terrible person his ex-wife is. That is similar to what is going on with this website.