While I don't condone the pilot of a commercial jet making an issue of his displeasure on the R/T, how else is it to be made clear to some occasional visitor anxious to brandish his civil rights that he is being the proverbial ache in the fundament?
By asking ground control if there is an alternative route that he can take to avoid the slow taxiing light aircraft ahead.
Obviously some of you have little concept of the time pressures many short haul commercial pilots operate under. Do you really think you should have equal status with a large jet with a slot time for take off?
Erm...yes. In fact it's written into MATS that all aicraft on a flight plan following a recognised route have equal priority. VFR/IFR Light/Heavy doesn't come into it.
By the way the original post is about Barcelona. I believe that VFR isn't allowed into Barcelona, so this must have been an IFR flight. It too may have had a slot time.
As for beling late for the slot giving you priority, that's a bit like saying that the queue of traffic ahead of you at the traffic lights should get out of the way because you are late for a meeting.
Either operate faster next time, or have more realistic gaps between the slots.
Having said that, I've never refused to give way to someone who had was in a rush, and have often offered to give up my landing or take off place in the queue to help out someone else.
But in this case it appears that the pilot was the cause of the our overheating problems by using the wrong taxiing technique, and the cause of their own delay problems by using the wrong technique for getting ahead of the other aircraft.
Still, I have to wonder about the OP, if he got so worked up about it, that the anger is still there long after he landed again. Live and let live.