Yup. People don’t realize there is already a not horrible approximation of runoff voting that still avoids the spoiler effect.
And just look at what happened when Sanders realized that. He went from being a meme about how nobody watches C-SPAN to one of the more influential politicians on the Left.
And there are scenarios under runoff voting where similar can occur (e.g. two seats, 2 right wing, 4 left wing) and is where the “election theory” aspect of things that certain folk are still bitching about (because that is the most important thing to have happened in the past 8 years, clearly). The party needs to take the results of the primary and downselect who actually runs to avoid splitting their own vote.
No voting system is perfect. But people should really understand what we have and what their NEED improves and fails to improve rather than just insisting “new is better”.