The most common burnout cause is adding 50+ new cards a day during content review, which then snowballs into a 400-card daily review queue you can't sustain. The fix is upstream: cap new cards.
For exam weeks, use cram mode (which doesn't add to your SRS history) instead of marathon study sessions that pollute your scheduling.
Streak freezes (QuickCards Free includes 1/month, Pro Max includes 5) let you skip a day without losing the streak — a small psychological win that's helped users stick with daily reviews for years.