i will never experience dopamine ever againNo wonder lethargy and depression swallowed you. It is common for incels. Fucked up brain chemistry. You most likely lack serotonin (or dopamine).
Most common "soft" therapy would be training, exercise. If it doesn't help, I would recommend selective serotonin reuptake inhibitors. Just not sertraline. It can fuel frustration even more.
Psychiatrists usually resort to ssri + "benzos" by default. . Escitalopram worked for me (with benzodiazepines taken only at utter need)