"bad things" is a subjective concept. A former roommate was building a website in the mid 2000 for a dildo company. You probably don't care, but a religious zealot might consider it "bad".
We're gonna make a deal, I'll let you work in ad-tech, and you let me build tool which allow people to shoot themselves in the foot.
Taking a fully relativist perspective on morality is just an excuse to justify taking no ethical stance on anything at all. It's certainly your choice to exist in society this way, but you can't be surprised if people correctly criticize it as selfish, self-serving, and morally bankrupt. At least embrace it.
That’s literally the idea. People doing bad things should find hiring minions difficult.