Tell me one tech company that does not use dark patterns? And I think the problem is not only tech, it's everywhere. People turned on the "money at all cost" mindset. They know their actions will do harm to someone but they simply don't care.
All depends if you mean actual dark patterns or something you find distasteful. Either way my current company doesn’t, we work in the electric Vergil’s industry. Not a single distasteful thing expect some of the meetings with clients and management plans. But tech wise, none that I know of.