There is the grass is always greener no matter which side you are on effect that goes on with just about everybody. Your psyche has a way of ironing out the wrinkles the further in the past things fall. When you don't feel the intensity of being in the moment with the darkness, with your very existence being unbearable, because you have taken yourself out of it through transition, you have stopped being a reliable narrator of your past. You won't see yourself that way though, because you did live through those black days, so obviously (you tell yourself) you know how it felt. Then feeling the intensity of being in a moment now with a present-day problem, you look back on your smoothed-out past and think maybe it wasn't so bad, maybe your life was better then. It wasn't, your perception just has been distorted by time.
My feeling is don't make major changes unless there is no other option, and until there isn't, try to make the best of things. That goes for both transitioning and de-transitioning. These are just not things to do on a whim, especially considering the distortion of perception which can lead to some majorly faulty judgement if you aren't super careful.