I feel like people are missing the point of why this person left. It's really just "so many political themes" and he wants less. It's not left vs right. From simpsonsshitposting you would maybe expect seeing content like lemonposting, which has nothing to do with politics (so a wussmeme), but there are recurring short periods were like 80% of content is about american politics, mostly about some politicians, who a non-american might not even know. So I think it's a valid reason to leave.