Atomic Habits is an interesting book and there's a lot to learn from it. Even though changing harmful habits or building new ones isn't easy still continuing to do things that reinforce the kind of habits we hope to acquire is effective though the progress may be slow. And since habits affects the quality of our lives I think we are left with no options on this. Becoming 1% better everyday is the best way to go about it.
1% better a day is weirdly unsustainable, isn't it? Just imagine the compounding. Though having said that, it might be possible to do 1% on something per day.