Don't try to change that workplace. If you were strong enough for that, you would not be posting about it. It is not energy efficient to row against the stream . Economy of action is essential in strategy, as any ninja knows
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Get a different job first and then quit. Read the career writings Steve has done recently. If you live in a village and that is the only company there, move to the city. Plenty jobs there.
No negative environment is sustainable.
Quitting is one of the finer pleasures in life!