I worked at Oscar for a few years, and I have quite literally seen and heard it all. I've read through many recent reviews and from my standpoint, my only con would be the bad apples who joined the business years ago and have stuck around FAR too long. No matter how many times people report them or raise a concern about inappropriate behavior/comments/management style, nothing happens as long as they are a top biller and bringing in tons of money to the business. This is a double-edged sword because if you have great billings and are hitting your monthly targets, you are near invincible.
I couldn't disagree more with the reviews I've seen that says Oscar is a pyramid scheme (that's the reality of working at any recruitment firm, start up on your own if you want 100% of the commission and want to pay for your own tools!) and that you have to lie and be sleezy to both candidates and clients to do deals. In my tenure at Oscar, I never lied to my candidates or clients for the sake of boarding a deal and I never felt pressured by leadership to do so. If you felt like you had to work that way, you likely had a very unethical manager who didn't belong in management, which circles back to my comments above.