Ask HN: What still frustrates you about today's e-book → audiobook converters?

If you’ve tried tools like Speechify, Eleven Labs, Google Play Books TTS, or DIY scripts: Which specific moments made you quit or request a refund? What worked that you’d hate to lose? Are you really listening to TTS ebooks or rather paying for Audible / human-narrated audiobooks? Which pricing model would work for you better than the existing ones?