To know whether this is a problem, more understanding of the reasons for complaints would be needed.
I suspect that many are about differences of opinion over the value of the house, and that is, in fact, understandable.
Looking at local houses on the market, most are priced very high for today's market, often at not much less than the peak. That is either poor advice from the agents, or people pushing for too much. If the former, that is good cause for complaint, if the latter, then not really the agents fault.
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