I was present for this round in particular as the HOS.
In short the mercenaries for this round directly involved the station by enslaving miners + Bar Shaleez, Burger's engineering lizard. Said mercs weren't really open for negotiation and flat out told me "hell no" in response to whether they wanted to negotiate for the hostages that they considered slaves. At this point we we were sitting at 20-30 minutes of a stupid standoff where nothing productive was happening, so I decided a risky rescue was the best choice we had. We lost an officer to this endeavor through bad luck and brainmed, and I nearly died to bleedout, but we still chewed up the mercenary team on two fronts and freed 75% of the slaves except Shaleez. We didn't know the suicide bomb attempt was even going to happen nor did we even predict this was going to happen. It still panned out relatively well, as our goal of freeing the hostages/slaves was still met, apart from Shaleez whose situation I still don't fully understand how it happened when there was a security team meant to choke the entrance to cargo.
Objectively speaking, the mercenaries that round put more effort into being violent dicks, rather than actually contributing something roleplay-worthy to the round. They were compelling antagonists as far as /tg/'s definition might go for a standard SS13 round, but they were not compelling antagonists by a heavy roleplay definition. I don't think Burger being pissed about that round is unjustified.
I do think just as much context needs to be established for the rest of the screenshots in here, for fairness' sake. There's probably not a good reason for Burger to be sassy towards the devs if he's made a habit of slighting them. He's a fine RPer nonetheless, though there is OOC attitude stuff that is simply intrinsic to him as far as 'Burger' goes.