The comments made were still about how Shane's face looks. Whether he chose to have work done or not, it's still a very personal nasty remark about how he looks right now, sitting at home watching SCD.. Remember, Bruno was using the comparison to criticize Michael, not in a complimentary manner. How would you feel if you had work done on your face and someone you dont know makes a comment like that on national television in front of XX million viewers.
Dont get me wrong, I would be one of the first to make such a similar comment about Shane or anyone else in a similar situation - it's just our sarcastic type of humour, but my point is, it didnt belong on the show.
On Strictly, sometime a certain dance or couple make uncomfortable viewing coz I am so willing them to do well when their time on the show is clearly over but more and more often now it's the judges comments that are making the parts of the show uncomfortable (that and Brucey's cringeworthy jokes

)