They're also very litigious. Of course they need to protect their brand, but in a lot of cases they are pretty objectively the bad guys. They have taken legal action against other orgs/charities using "for the cure" in their names, they've taken action against orgs/charities using "cure" and pink together.
In general I think they are more focused on self-perpetuation than curing cancer. There's a lot of reading material on how some of their corporate partnerships have been deceptive in the sense that Susan G Komen received very little directly financially, and took the opportunity as a chance to market themselves instead.
Their CEO and upper management do make a lot of money, but I don't think it's out of line for an organization their size. It's still a matter of controversy though.
For the curious, Karen Handel (now R-GA6) is believed to have been the driving force behind that.
[1] https://mobile.nytimes.com/2012/11/09/giving/komen-foundatio...
[2] http://www.latimes.com/business/hiltzik/la-fi-mh-susan-g-kom...
https://www.charitynavigator.org/index.cfm?bay=search.summar...
They got involved in a political fight involving Planned Parenthood:
https://en.wikipedia.org/wiki/Susan_G._Komen_for_the_Cure#Re...
There's a documentary about it called Pink Ribbons, Inc.
I also heard someone once criticize them for supporting anti-choice politicians but I don't know how true that is.