I spent 12 years at LinkedIn. Sadly, it's not even close to the engineering org it used to be. The era where Kevin Scott led engineering was a really good one in comparison.
IMO more about growth of the engineering teams that lead to any specific culture deteriorating.
As an aside, I work on a product that should be considered feature complete, but PMs keep dreaming up features so they can get promoted. I wish we could just take some time to clean up the horrendous tech debt accrued over the past 10 years of feature proliferation.