Game "journalism" is largely a joke. There are conflicts of interest not disclosed. Opinions are influenced by trading publicity for access or other perks.
People sometimes act hypocritically. They say one thing and do the very thing that contradicts what they said.
Disagreements on the internet come from the so called "call out" culture. There is a tendency for calling someone out when you disagree with them. Which is not in of itself a negative thing to the degree you are not an asshole about doing so. The main problem becomes when things get personal and one tries find dirt on the personal life of one's target by "doxing" to hurt and discredit them.