I can only speak from experience, but I know what you mean with the not wanting to do the thing that would reverse the negativity. It took time and a lot of patience to get to where I am now, where I rarely if ever get lingering negative emotions. In hindsight, what I can say, at least for me, is that I went from trying to "combat" strong negative emotions, to figuring out the root of whatever negative emotions tended to arise, and began approaching life in a way that would prevent them from coming up in the first place.

The best way I can explain why we can fall into the trap of not wanting to do the thing that would pull us out of the strong state of negativity, simply has to do with energy. From my personal experience, I've learned that negative emotion only comes about when I'm in a state of low energy. Think about it this way, when you are full of energy and high on life, do you have negative emotions? Usually not, right?

With that in mind, when you start having negative emotions, your battery is already low, therefore, you literally don't have the energy to muster up to go workout, or go make yourself something healthy and nutritious. And sometimes this can lead to a negative feedback loop because you want to pull yourself out of the negative, low energy state, so decide on getting some exercise in, but exercise demands the usage of more energy so your battery gets even lower, and you're stuck in the low energy state of negative emotions and thoughts.

Therefore, how I gradually pulled myself out of the constant state of negativity was by little by little fixing the things that were draining my battery and replacing them with habits that would keep my battery full or close to full at all times. And knowing what activities had the potential to use up more energy in order to make sure to implement proper recovery and rest the next day to prevent my battery from going into the red. I've learned to always operate within the green and yellow, and believe it or not, I rarely get any sort of negative emotions and thoughts, and even if I do, I'm able to control them instead of the other way around.

Also, I believe it's important to be kind to yourself as well as try and understand why and what your negative emotions represent. I've realized that negative emotions aren't all that negative, in that, they are just signals from your brain to alert you that something is wrong internally, whether it be with some sort of nutritional deficiency, or something stress related that you may not have addressed properly. When I shifted my mindset from seeing negative emotions as something that brings detriment to my life to viewing it as my mind and brain's way of urgently telling me there's something wrong and urging me to fix it, I no longer had this toxic relationship with negative emotions but rather began adopting this feeling of gratitude toward any sort of negative emotion as they became opportunities to learn more about my own health.