What's the one thing that's stopped you from finishing an online course?

Building LearnOptima came from a personal frustration: I kept starting courses and never finishing them, and most "personalized" learning tools weren't actually personalized, just generic content with your name inserted.

Curious what's actually stopped you.

1. Was it the content getting stale?

2. No clear sense of progress?

3. Generic material that didn't match your actual level?

Trying to figure out what resonates most before launch on Aug 23, and genuinely want to hear real answers, not just validate my own assumption.