What made you vulnerable to kratom addiction?

I'm currently tapering down and this subreddit is a great help. I was just asking myself what mental breaks or events caused me to get stuck on kratom. For me it may have been frustration after knee surgery (i am a passionate runner) and a lot of stress (mental and financial) from my beloved but sick dog. But maybe the cause is deeper than that. Knowing the cause ist probably an important factor in stopping it in the long term. Have you found out what it was for you?