Most of this stuff is pretty well documented, know you like to play damage control here for the game but the devs being shitheads ain't exactly fucking a new thing.
Most of this stuff is speculation. That's simply a fact for any forum talking about what going on in game devs heads.
For instance, this specific thing that people just caught wind of happened...in 2020. The hobgoblin scene has been in the game for almost three years. It was also towards the beginning of development, when they were trying to do more bespoke loss scenes for companions, which they've since moved away from.
Savin also, from what I've seen, was the one who commissioned Tobs for the scene, not just something he wrote out of the blue. Not too mention that Brienne hadn't even been in the game that long, and the polls hadn't even happened, so Tobs being salty about Brienne is even more unlikely.
On top of all that...Brienne isn't more popular than Kiyoko. Not by the official polls at least. Kiyoko is the most popular companion by over 50%. Brienne is actually closer to Caits popularity than Kiyokos. So Tobs being jealous enough to write a spite scene towards another writer doesn't seem to have a strong reason behind it.
On top of
that as has been pointed out, Brienne isn't actually the only one on the scene, just the only one people really care about.
Which is all to say, the idea that Tobs wrote it as some kind of spite move towards Wsan is
...extremely unlikely.
Probably just got the request for the scene and was feeling kinda rapey that day.