That would be an improvement actually, because the customers of these companies are not users, they are other companies looking to advertise or buy users personal data. The users of for profit social media are in fact the product, not the customers.
Workers don’t give a shit about customers because that’s how the incentive system is set up. Give workers the profits, you give them a good reason to give a shit about how clients feel.
You skipped over the part where he says "You think I own this business? You think I own IKEA?" implying he would care if he actually had any skin in the game which he would if his job operated as a worker co-op.
Capitalism is a system of capital accumulation with the people who own the means of production and hire workers to operate them. Co-ops are a market economy, but they're demonstrably not capitalism because capital is distributed fairly amongst the workers doing the work. Learn the difference between markets and capitalism.
Co-ops can be capitalistic and are capable of functioning under capitalism, but they would also work much the same under any market economy. Decisions and would be profits are democratized/socialized.
Workers care about their jobs, and driving away customers isn't the best way to ensure job security. Reddit is trying to IPO so that the investors can cash out. They might destroy Reddit in the process, but they don't care because they got rich. If you're an employee at an employee-owned company, then you would be more concerned about long term success.