I get that Musk is a controversial figure and that this event was a debacle, but I dont know how you can ignore SpaceX and Tesla, both arguably the most successful companies in their fields right now by some metrics.
Tesla is a terrible mess, and only by Silicon Valley standards can it be considered successful at all. It is not even close to being "the most" successful car company.
This is why Musk is a controversial figure; he's a Valley-style startup hype man operating in the wider world. Whether that approach is sustainable is what the fighting is about.
Tesla might be the most impactful EV company, in that you can make an argument that what Tesla did (and, to be frank, what they talked about before they did it) changed was to is, but Nissan, GM, and Hyundai are all making EVs that are decidedly not "toys" and Tesla's advantages in the EV space (not necessarily the creature-comforts space, but a big reason why I won't buy a Tesla and am buying a Hyundai Kona EV is because I don't want a giant tablet screen as my instrument panel) are shrinking.