Lost in life... ..Can't find answers

I am in my late 40s. I was a private teacher in a Mumbai school and was given the most amount of work in my Institute. I was completely drained out and looking at my colleagues just chillin at work made me more envious, moreover the school reporting time was 6.30 a.m.. I just left one day out of burn out, favouritism to others, extra responsibility and unbearable anxiety. Later got to know that from this academic year that the management started PF for all employees and promoted the ones who were good for nothing. I am almost lost in life..