An actual translation of Anicca is something more like our inability to maintain things as we like. The inverse, Nicca, is our tendency to believe that things could or should be maintained to our satisfaction. The flow of positive and negative experiences are undependable, indefinite in duration, intensity, and frequency. That our hopes of forcing them to be stable with our mind will be in vain. Anatta is pointing to the inverse of a specific mental event, Atta. Anatta is to point out the error in this way of seeing things. The point is to notice the mental event that represents objects or concept as though they could or should be inherently or essentially controllable/ownable. Nicca, Atta, and Sukha (the opposite of Dukkha) are maladaptive strategies. Not only do they not get us what we want but they maintain the conditions that lead us to keep using them.
https://neuroticgradientdescent.blogspot.com/2020/01/mistranslating-buddha.html?m=1
