Armchair Engineer

A person, often who does not hold an engineering degree or does, but has no actual experience with real engineering and ended up in a different technical field. This person can often be found on facebook or other social media platforms criticizing engineers for apparent problems with consumer or other products that they believe could be better. This person is quick to point out obvious faults because they believe engineering is simply envisioning a perfect product, and that makes it happen. They have no understanding/experience with the cost, management, cross-functional team collaboration, qualification requirements, documentation requirements, problems of similar parts, legal regulations, interchangeability with other parts or assemblies, material properties and compatibility, corrosion resistance, lead times of parts and material, production costs, service restrictions and costs, low rate of failures pertaining to the one they unfortunately experienced, or many other constraints that limit the "perfect solution" that they envision.