This is the only place I've ever worked that actually made me want to stop being alive.
I worked in the Portland office, which was acquired by comScore when they bought Rentrak. The place was a mushroom farm with a pretty bad/depressing atmosphere to begin with. The company had low morale from years of poor management and was basically a palace of frowns, and an annoyingly meeting-heavy culture did not help. It was also the least diverse place I've ever worked. Almost entirely mopey white guys.
The comScore acquisition made everything much worse. Some of the perks went away, many of the resources needed to do our jobs became very scarce (cloud servers, etc), they made all of the Linux-using engineers switch to OSX and Windows, had a pretty oppressive "we own all your thoughts" employment agreement, and many engineers left because of it, myself included.
All of this might have been something worth putting up with if the company was putting Humans on Mars or curing cancer, but at the core of it, comScore is a spyware company. Their business model is based on making it easier to deliver more targeted ads to people and maximize the revenue from those ads. So, every day you go to this mushroom farm where you're doing nothing to make anyone happy or improve the world with barrier after barrier is set up in front of you, and it chips away at you little by little until there's nothing left.
Now that I don't work there, I'm not sad anymore. Please do not work at comScore. It will crush your soul. Heed this warning, it may just save your life.