Mediocrity, rarely reached

When did it happen last time

on checking your mirror
that whistles blew, bells would chime
seeing yourself clearer?

That in reflection
on inspection
saw not perfection
or affection?

Mere mediocrity, schmuck!
Rarely reached, often worse:
Barely scraping by in luck
until pulls up the hearse.

(+)
schmuck = (Yiddish) a jerk