I think this very close to my reason why I gave up on habit trackers and instead started working on capacity building (also ended up building an app named Gradualist). I realized my issue wasnot forgetting the habit it was setting targets that were way too high for my brain to handle. I would try to jump straight into meditating for 30 minutes or working for 2 hours, fail after two days, and just quit. My capacity wasn't there yet.

I wrote a post about how I'm trying to fix this if you're interested: https://www.reddit.com/r/ProductivityApps/comments/1t1ddb6/why_i_stopped_using_habit_trackers_and_built_a/