Senior management takes advantage of younger employees, which should be no surprise in the industry. Prepare to be underpaid and battle at every chance you think you have for a promotion or raise; it is likely not to happen.
Often, I would find that I'd be promised to work on a project that piqued my interest, only for it to be shifted to the creative director, not allowing the team to try new things to increase their skills as promised.
Creatively, you'll end up doing more work for the CEO's personal social media accounts than you'll have agreed upon.
If you are religious, be warned the CEO will often compare himself to the Messiah in the guise that other people have called him that.
Jokes about the "Me too" movement are also often made in the workplace, slurs, and other inappropriate jokes, including a slack channel for sexual innuendos.
Note: HR is a position that doesn't necessarily exist in this company.
Another downside was the "family-like" environment that encourages longer working hours for fewer complaints, but if you're too close to someone, management will notice, and eventually, you'll be separated.
As for a healthy work-life balance, you won't be encouraged to have one. From the CEO and management boasting about working on the weekends to publicly shouting out employees who worked after hours, you'll never feel like you're doing enough.
The management team is mostly men that have been there for YEARS. They're all close, and I have seen them push out other members who didn't fit their energy.
While this may sound dramatic, finding proof of these things would take seconds to search the slack channels or reach out to past employees.
If you're someone who can create firm boundaries and can detach emotionally on the day-to-day, then you may find this company bearable.