The phrase "a source of complaints" is correct and usable in written English.
It can be used when referring to something that causes dissatisfaction or grievances among individuals or groups.
Example: "The new policy has become a source of complaints among the employees, leading to discussions with management."
Alternatives: "a cause of grievances" or "a point of contention".
Mr. Reichenthal said that the strip had been a source of complaints for years.
The individual mandate has long been a source of complaints about the ACA.
Increased Medicaid costs, a source of complaints from city and county governments across New York State, are continuing to take a toll on New York City's budget.
Bear in mind that although the issue of bad body odour may seem unpleasant in the office and a source of complaints from other employees, it may indicate a bigger problem, so it's best not to joke about it.
"The real question to ask," one author writes, "may be, 'Is endo uncommon in menopause, or is it not commonly diagnosed in menopause?' In fact, endo as a source of complaints may be underdiagnosed in postmenopausal women".
Many of the documents posted on the Web sites, like term papers and prior exams, have long been available to members of fraternities and sororities, which archive them (this has also been a source of complaints in the past).
Mr. León did not have the money to carry out all his intended changes, particularly a promise to significant raise salaries, which start at $500 a month for new officers and are a source of complaint in the force.
The involvement of Mr. Lagerfeld in that exhibition, along with increasing sensitivity in the museum world over commercial sponsorship, became a source of complaint among Met curators.
The daily commute has long been a source of complaint for many, with expensive travel, overcrowded public transport, and terrible traffic making it an often unpleasant experience.
