If having reliable equipment is important, you pay for it. And one cannot be serious without reliable gear, whatever it is. When one looks at the cost of say a Nikon F on the used market plus the cost of a CLA by a competent tech, and compares it to the cost of an F when it was new (roughly 1/4 the cost of a small car) - it looks like a steal.
The alternative is an endless series of dysfunctional cameras.
If you want unreliable crap, spend your money at lomography.