You'll be expected to give more and more of your time to the company, including long weekend events where it was expected you'd dance with colleagues (awkward), with little to show for it. If often felt that you were isolated from your loved ones, like during the holiday party where no significant partners are allowed, just to rely more and more on the company.
Unless you are one of the Ivy League recruits that come in from the 360 program or from a famed business school across the river, you will be treated as an insignificant resource whose energy will be taken advantage of, and will soon burn out. Growth can happen - but it's unfortunately mainly lateral.
Pay is abysmal, and pay equity among colleagues doing the same work and having the same experience is non-existent. Despite living modestly, my colleagues and I had several side jobs to be able to stay afloat financially. We all had a mix of sad health issues resulting from long hours, the unrealistic expectations thrust upon us, and negative work environment.