It is becoming increasingly understood that late stage capitalism under it's neoliberal regime has caused depression, anxiety (including alienation-induced fear of crowds), insomnia, and drug abuse in the lives of workers due to: lack of value and control the worker brings with their labor due to the advanced separation from the worker and the products of their labor, the inhuman alienation we suffer, widespread pervasive and highly toxic propaganda from the capitalist state, fear and stress from an unknown tomorrow under such an anarchistic and caustically anti-worker economic system, a compassion-less social system and culture which antagonizes the alienation and agitates such mental conditions, and far too many other conditions for me to list to be quite honest.

Personally I believe it's likely the sudden and massive influx of ADHD cases is also due to the material conditions. The shift started in the west in the 90s after the fall of the USSR and the pillaging their of by the west, which caused a massive and sudden influx in capital and economic activity in the western proletariat, which came faster than we could properly adjust to them, causing overstimulation, motivational stagnation, hyperfixation adaptions, sleep disruptions (a thing with ADHD) and and emotional immaturity..which in turn helped craft much of the culture we have now built around multi-tasking, cartoons for adults, 14hr work days, and a litany of anxiety-based conditions.

I wouldn't say I have any illnesses, just conditions I suffer due to the material conditions under capitalism.