If Musk had legitimate criticism of the bill grounded in facts, then I believe it would have been perfectly reasonable to make an attempt to try to influence lawmakers. The issue here was the use of misinformation, influencing lawmakers to make decisions contrary to what a factual argument would lead them to have made.

“I can get out anytime I want, I just like it here” - vim user

No, part of the antitrust requirements would likely be them having to stay out of the browser market for a set number of years.