These defeats are causing a real problem though
They lead to a diminshment of any soft power that the FTC might have, and brings in a perception that they are solely looking to stop mergers 'just because' and not out of real concern.
The ruling in the injunction case for the Activision merger specifically said that they'd had 180 days to look at evidence and hadn't found a single thing that showed illegal behaviour - that in turn gives a strong pointer that the main investigation will end up a nothingburger as well.
It really looks as though the US is pretty much going to have to rely on the EU to reign in the excesses of big tech companies, as they simply aren't able to lay a glove on them.