Lina Khan has honestly been doing an amazing job in her position. She's taking on the amazons of the world and you're complaining she isn't doing enough? In a perfect world we could just clone her so she could also break up these other industries.
She's single-handedly responsible for denying public markets investors the ability to reap the benefits (by investing in) from all of the hot tech startups that are too-small to go public but would have been attractive acquisition candidates in the past.
Now Meta/GOOG/MSFT/AAPL/AMZN know they cannot acquire anything large, so these companies either sell to PE or continue to raise from huge late-stage funds.
I don't like a lot of what "big tech" does but this isn't a good situation either.
