Because MSNBC is an American organization and their coverage is American-focused, their bias relative to American politics is what’s relevant here.
I understand what you are trying to say, but I disagree. They are making claims about a lot of news outlets in other countries, which means they cannot present an American skewed perspective as the truth (unless what they really want is to export political views and exert influence domestically and abroad, now we might be talking here).
It doesn’t matter what their beliefs or policy positions are relative to any particular standard, what matters is whether or not their work presents the news accurately or in a way intended to mislead or influence their viewers in favor of one side or the other, which they clearly do.
All reporting should be held to the highest standard. Anyone seriously attempting to critique and comment on reporting at a meta level, should hold themselves to the same, or even a higher standard, for the same reason. What I am essentially arguing is that the MediaBiasFactCheck falls in line with pretty much all of US news as mass propaganda machines in the interest of capital. If you disagree, why do you think they operate at all?
Yeah, living in a parliamentary democracy means I have to make an effort to wrap my head around how the US "democratic" institution works. The internal structure of the Democratic Party has more in common with our democratic structure than the structure of their "competing" parties. As a result there is more room for difference within the Democratic Party than within a political party in our system, but the political difference between parties in our system is greater than those within the democratic party.
My analysis has long been that there is no political will to implement leftist economical policies in the US, i.e. those that really matter in the grand scheme of things, even though there exists a semi-conscious wish for them within the populace. Please do not misunderstand, increasing equity between people of different backgrounds is important, but important single issues such as gay marriage are insufficient if they do not come along with, or better yet, as a product of equity of material conditions. It was all the same with the feminist movement where social advancements were conceded in lieu of increasing their economical statuses, with the division in measurable quantities, such as income or capital ownership still going strong (note I do not advocate changing the ruling elite from one subset of people to another subset of different characteristics, but instead saying that capital ownership should be transferred from the subset to the whole).
Strengthening the political power of the marginalized by increasing the material conditions of their strata is the best way to make social progress, which the ruling elite of the US is painfully aware and which is why they sometimes are willing to skip the first step and reach the inevitable second immediately. The discrepancy between the people's wants and needs for leftist policies, again conscious or not, and the actual politics of the US, is deeply connected to the Democratic Party's willingness to concede these social changes without losing the backing of the capital interests that fund them.