Kennedy's attempt to help his new ally, Trump, was destined to fail. As a leaked video of one of his campaign workers proved, Kennedy never believed his constitutional rights were being violated; he just wanted to make sure not to siphon votes from the former president. Kennedy's deceit was further proven by his attempt to get on the ballot in New York while trying to be removed elsewhere.
This is a defeat for election integrity. It doesn't matter if Kennedy is on the ballot in most states; in the battleground states — where the margin of victory could be very narrow — it's dishonest to risk having people who would be inclined to vote for Trump think they could also vote for Kennedy. This could lead to further questions about the legitimacy of the election.