Lyric discussion by Soundtallica 

Cover art for Low Ceiling lyrics by Alice in Chains

I definitely see the interpretation about poking fun at music critics (or any critics for that matter), but the lyrics are open enough to see other interpretations as well. I can also see it being about being suppressed (possibly from first impressions, given the "it's your moment in time that defines and deforms you" line) and being frustrated about it.

Yet another great song off of TDPDH!