The USA is relying on SpaceX because every new president kept rewriting NASA's project goals while reducing funding and changing their priorities, therefore severely harming the USA's ability to put stuff up in space on their own.

But Elon tried to do that and despite being government-funded (SpaceX was saved from bankruptcy by government money), so politicians didn't keep telling rocket scientists what they should be doing and Elon kept his mouth shut because if this company fails he'll be in trouble. Thus SpaceX managed to work despite him.

Then Elon got into his head that he's actually a genius rather than a guy employing geniuses and now doesn't understand why advertisers are pulling out of a platform whose moderation staff he is proudly sacking.