Sounds to me like the problem is managing stress due to a lack of healthy growth. You are lacking leadership fundamentals guiding you in your life and career. Leadership is about awareness, knowledge, experience and skills in growing roles and responsibilities. That's a trite summary, but in short we are individual contributors, team managers, managers of teams, managers of managers, or organization leaders. We grow throughout these stages and healthy growth means not too fast and not too slow, but at a rate where we develop the experience and master the skills necessary to level up. Often we take on roles before we have the skills to do so, and when this keeps happening the damage piles up and eventually comes back to haunt you. That sounds like where you are now.

In your post when you say you want to do something menial it says that you want to go back to the level of individual contributor. It means in moving past that role you didn't master something to prepare you for the next level and/or what you are doing at your current level is not commensurate with your skills and experience. That means what you are required to do in your role on a daily basis is beneath you or beyond you. Something is not consistent between your level/roles and responsibilities and your experience or else you wouldn't have a problem.

Healthy growth keeps you engaged and moving forward at a rate consistent not with your wants but with your needs. You may not like doing something but that doesn't mean you have developed enough to move past doing it. You may like doing something but that doesn't mean someone at your level should be doing it.

When you get stressed by something. It means you haven't mastered managing stress associated with tackling problems at that level. It may also mean that the organization is requiring you do things a person at your level should not be doing. Either way you shouldn't be getting stressed, you should be taking the appropriate action for someone at your level -- developing what you are lacking to manage stress (awareness, knowledge, experience and skills) or doing what needs to be done so someone at the appropriate level deals with things you shouldn't be.

In short leadership of the company is mess. Most companies are because few understand the most basic principles I've vaguely described here. If you're getting stressed you need to understand why. Look at the levels I've described and start asking yourself in each role/level what stresses you out. That's where you failed to grow as you moved up, and where you need develop your experience and skills before you can move forward.

Stress management and awareness are two of the most difficult things to master because of how entwined they are. Don't listen to anyone telling you to do drugs to manage stress or emotions. Instead, start by getting physical exercise. Go for a long walk alone regularly. It does wonders. It gives you time to reflect and think and plan. Getting the blood flowing physically allows the body to do what it does to manage stress chemically. If you need to do more, then level up your physical exercise to something more strenuous and active, but most people don't find walking to be a burden and can motivate themselves to go for a walk. It will address the most basic physical needs and buy you the time to reflect and address what mentally causes you stress.