Based on my experience:
Unspoken expectation to work relentlessly, outside of your scope and definitely beyond 40 hours without overtime pay (as well as on vacation).
Extreme disorganization, poor administration, broken communication, and excessive dependence on far too many apps, platforms, task management tools.
Task management tools that were not at all utilized properly. A lot of assigning work and tasks with critical deadlines via messaging.
Disorienting amount of duplicate, tedious menial and manual work (especially due to the clunky information strorage systems and workflow processes).
The expectation of folks with minimal experience or guidance to fill a significant managerial role with, again, zero processes in place, the loose promise to offer them solid support and facilitate their confidence into the role. This led to frequent role swapping and burn out.
A lot of fluffy hip, cool, progressive workplace talk, lingo and cultish language to dance around the fact the place was madly disorganized and overwhelming.
Bizarre emphasis on drinking culture and access to alcohol. It is absolutely easy to perceive this as a tool to appear fun and "not like the other corporate offices" to a younger naive workforce.
Constant name and price changes to service packages, service details, scope of services and packages, flexibility of services, it goes on. These changes were often communicated in fleeting moments and not well established in an official documented format.
At times, completely unsustainable workload responsibilities and expectations, endless list of clients (200-600+ assigned to individual people when I was there) who you were expected to be available for and get back to in 24 hours or less.
Hierarchal, and at times, a pretentious divide between sales/account management and the other departments. Sales/Accounts were glorified and blatantly put on a pedestal by the CEO and VPs.
An attitude of underestimating your client's knowledge. That drove me mental.
Loose, unreliable training systems. Difficult to be self-resourceful and self-taught as well when the drives were loaded with outdated, unedited documents often titled "copyofcopyofcopy" before getting to the point of what it actually contained.
Managers spread way too thin.
Exhausting and very draining work environment, especially if you have a history of workplace trauma and/or burnout.