A lot of the time, low quality answers are either irrelevant or are better stated as a comment on the question. There is no option to provide feedback on either of these, since they are not comments on another answer, spam, link only, or a different question. I propose adding two more options:
This is a comment, not an answer*
and
This has nothing to do with the question asked*.
*or something similar
Is this about the canned comments in the review queues, for answers?
Yes it is. When a dozen answers can be summarised by "Irrelevant" or "This would be better off as a comment", it gets annoying to have to repeat the same statement over and over. Especially with the minimum number of characters issue $\endgroup$