They were outnumbered and outgunned. They had no chance.
That is just supposition. The Iranians never even fired as much as a warning shot at them.
One possible scenario would be to stay on board the freighter and refuse to go with the Iranians, The ball is back in their court. They might scream and shout, but not open fire. A tense stand off ensures which is ended with the arrival of HMS Cornwall. Result no hostages, please stop asserting that the ONLY results were 15 hostages or 15 killed after a futile fight.
"That is just supposition. The Iranians never even fired as much as a warning shot at them. "
No ti si not, there were several iranian vessels, to out few armed folks. Anyone who has done military service will tell you, you don't f*** about and play waiting games with a hostile foreign force.
You have to be realistic and consider your options.
And btw, which credible source is backing you up?
Our military asserts they did the right thing, and I trust them over any arm chair generals any day of the week.