What does your manager/iteration manager think? Are they feeding you the same feedback? It's only a matter of time until it bubbles up to them so figuring out a plan might be appropriate.
During my first week, I started down this path. I made comments in our chat, and was quickly told by my manager to take it offline. I was told that I shouldn't be "opening cans of worms" with other teams. So I had to be more discrete about understanding my new role, and figuring out Where the Bodies Were Buried in more round-a-bout ways.
That's the only direct feedback I've gotten from above; this is dysfunctional right?
I'd look for an exit plan - good luck!
I've been here before, and you also have to be careful of who you get support from as well.
To be fair, most workplaces have history to some degree or another. If you are able to keep your head low and excel at the tasks you've been given without showing others up, you'll do well and might even be able to make a clean escape!