I suspect there is more to this individual’s story, but IS&T is truly horrible. It’s full of fiefdoms built on tier 1 consultants (H1-Bs who are treated horribly).
Apple Retail and IS&T clash horribly, projects run over by years and tens of millions of dollars. Seating is beyond inadequate. There is very little very that is redeeming about IS&T, especially when compared to the other organizations within Apple (Apps, iOS, macOS, coreOS, hell, even iCloud).
They were so much better. And have slid slowly into complacency, if not worse.