“First he complains about being unlucky .... then while we chat along, he injures one "meatshields" which was supposed to retire upon the next injury ... and in that moment i type "y" ... losing my apothecary...

Well, so far things can happen. But i consider it bad sport to use a DP after that...
(which took out a semi-important player to SI with AG drop), while my most important player got killed afterwards.

So, if you play this coach:
Do not listen. He will whine. He won't show any sportsmanship, especially for things that happen while you are polite and answer him.

PS: I have no idea how much you trust people who say sorry and then laugh. Also i don't complain about using the DP, but the way it was used - after i lost my Apo by chatting. Third and hopefully last, people laughing at their own jokes ... well.”