Erika Hall is great here, on why surveys are "the most dangerous research tool":

“When you are choosing research methods, and are considering surveys, there is one key question you need to answer for yourself:

Will the people I’m surveying be willing and able to provide a truthful answer to my question?

And as I say again and again, and will never tire of repeating, never ask people what they like or don’t like. Liking is a reported mental state and that doesn’t necessarily correspond to any behavior.”

Alarm bells should ring if, when encountering a research need, the first answer that comes is "we can do a survey". So, so, so often, the kind of questions you need answers to cannot be satisfactorily answered with a survey.