This is a real shame. Meta is a company that is trying to do something (beyond Facebook) and I think a Unity acquisition would benefit both of these companies (in their current positions).
If Microsoft is allowed to buy Activision Blizzard they would have bought the vast majority of the most popular video game series in the world.
Minecraft, Call of Duty, World of Warcraft, Diablo, and Elder Scrolls are all top selling game franchises.
The only company that would have more top selling game franchise would be Nintendo and they created all of them for themselves.
Why is Microsoft allowed to buy all of these game studios but Facebook can't buy a single VR studio?
Yes. And Amazon. And Google. And others.
What the the US government is doing, I have no idea about, but they don't seem to care a lot about preventing huge companies from taking over entire markets, even those not related to their core business. Which already is hurting consumers, but the worst has yet to come.