Yes, this kind of thing happens all the time. The associated homeowners are the worst cause you have fifty opinions about one property.
Most important is that you do not let it get to you, it is just another day in the business. Beyond that you may find that these things can lead to more work. Listen carefully to the comments, complaints, and concerns and suggest how more services can remedy the situation. In this case, maybe, next time sell quicker clean up service at a higher price.
A lot of times I read posts here where someone thinks that they are being criticized or stressed out by their clients when in truth, they are being told that they should be providing more service or product.