That is fucking nuts. Four or five motors is insane, and sounds like the manufacturer really cheaped out. My cheap bafeng motor (and entire rear wheel) costs $450. Same torque, and water resistant with an IP rating. $700+ for a motor that has bad bearings and no water resistance and a faulty PCB...
Make your shit more repairable, and don't burn goodwill by churning out motors that fail and turn people off of biking.
Bafeng isn't great on repairs outside of warranty, but at least there are sites that sell replacement motors, planar gears, etc.