Sometimes it's hard to see how we change over time, trying to make positive strides with something, and then we fail... It's okay. All the work that's been done means something, and we just need to dust ourselves off and get back in there.
We don't have to go back to the starting line and start over. The enemy would love for us to feel shame but God is not about that. God is helping us change. Yes we'll slip and fall but it's not the end of the world. It's going to be okay. Keep leaning in to the Lord and He'll walk you through it all.