It's another thing to talk about a "carefully crafted image is being presented to manipulate the reader and to push forward a corporate agenda hidden behind a veil of optimistic language," a "toxic feeling," a "nightmare in my eyes."
The first case is just what it's like to be introverted, and I empathize with that. The latter is something else. That negativity and cynicism speaks to issues deeper than just being introverted. For example, I had this problem a few times before, and it usually had to do with feelings of jealousy over being left out.
I am somewhat introverted. Here's what I do if I'm at a company party/retreat/etc and I'm not having fun (usually because I don't see anyone I know): I leave.