this fanon image of abby langdon as a vaguely spoiled and entitled rich woman fascinates me, because while it correlates to what we see on the show, it's a pretty loose correlation. Everything we learn about Abby Langdon is through the medium of other people, specifically Langdon himself. To believe that the image he presents of Abby is accurate - someone who wants a Birkin, for example - you'd have to trust that he (1) understands his wife and (2) is a reliable narrator. Langdon is neither of these things.
Langdon's conversations with Dana imply that he does not have a very good sense of what Abby actually cares about. We know that Langdon believes Abby would want a Birkin, but Langdon also believed that she would be fine with a puppy and that his four year old son would take care of it. Every time Langdon comments on his wife, Dana corrects him. Dana isn't necessarily a reliable narrator either, but that's where I point to the context clues. Is the show affirming Langdon or Dana in the goldendoodle and vacation scenarios? What does this say about the accuracy of their respective views of Abby? How does this relate to Langdon's larger character arc in season 1?
Another way of asking this question: are these Abby's flaws, or Langdon's? The answer could easily be both. Season 2 pretty heavily implied that Langdon's marriage is less than great. We know very little about Abby, and many options are possible. But what we do know is:
she reasonably doesn't want a goldendoodle
Langdon believes she would want a Birkin, but Dana calls this into question
She stays with Langdon after the events of season 1
These offer many possible readings: a woman grudgingly doing "the right thing," a stressed mom who is desperately wondering why her husband has changed so much ever since they moved, and, admittedly, someone vaguely rich and spoiled. the show leaves it wide open for interpretation, but regardless imo any finger pointed at Abby really also points at Langdon in the end