You will not find what you are looking for in another career. Not without a change in mindset first!
Accept that the world is full of BS, it might smell a little different elsewhere, might be a slightly different colour in some parts of the world, hell- some companies might even tie it up in a pretty bow for you... but its still BS.
Your career does not define who you are. Find an outlet outside of your job and get some perspective back....rediscover what motivates you.....once youve found that out you will have an easier time working out what you want to do career wise.
The grass always seems greener. It isn't. Someone mentioned self employment...try 7 days a week, 12 hours a day for a few years ( dealing with guess what? Thats right BS from customers
) then come and talk to me about how green the grass is as a company director.
Good luck.