"bit of a sensationalist" is reasonable feedback; no slack needed. After all, this is how they learn.
It would probably be better for such learning to occur in a place that doesn't create immutable records of judgments from one's peers; i.e. Hacker News comments.
people learn when they’re given kind, direct, actionable feedback from people they trust - not when they’re called sensationalists by random critics on the internet.
what have you made lately?