OP is not telling you to "feel better" - he is saying he was only able to tackle his depression after taking a more holistic approach to monitoring and changing his brain operation.

Emotions are, quite literally, certain chemical states in animals with nervous systems of at least a certain complexity. That's where the "chemical imbalance" mantra falls apart - at best, it adds no information, and even worse, its used to peddle drugs which are developed without coherent and predictable models of the neurology involved in the symptoms/diseases they're supposed to treat.

Medical doctors get at least one objective measure of your blood pressure before prescribing blood pressure medicine. When was the least time you heard of a psychiatrist only prescribing meds after performing an MRI?