Save your energy looking up the the word in a dictionary or a search engine. I might be the first person ever to use this word. It combines the word "complaint", which means an expression of dissatisfaction, and the word "phobia", which means fear. When they are joined together, the resultant word "complaintophobia" means the fear of complaints, as you've already guessed.
First, let's talk about why a person at work can get complaintophobia. For sure it's because the person cannot accept any actions taken on the wrong deeds he/she has done. And why can't this person? It's either because this person decides not to or because there was an event of complaint in the past that was so significant (e.g. something really bad happened) that changed this person without his/her self-control. The former is more usual. Then, why does this person decide not to take any complaint? Mostly because he/she is afraid of losing the job. Now you know why one can get complaintophobia.
Next, let me tell you some complaintophobia-related matters. Man, I feel like I'm about to begin to complain. Whatever. There are people who say: "If you are not happy, you can complain to the top manager for all I care." And there are also people who say with anger: "Do you have to complain that you are not happy with that matter?" The first kind has the right attitude, without taking work efficiency into account. Think about it. When on earth does a worker have the right to stop the customers, whom he/she is supposed to serve, from complaining, let alone the right to get angry with customers' complaints. If one does everything well, one has nothing to be afraid of. Some librarians of my college are good examples of the second kind. I can understand the level of "pressure" one can get by being a librarian of my college, but that does not mean the right to get angry with students' complaints. They can get angry with the students for small matters (like a lecturer being called by the students to the library to get some books from the librarians). I bet they will die to find out the author of this blog if they read this entry... Simple, because they can't take complaints. Well, I just guess. Don't take it too seriously. In fact, what they think are complaints are not all complaints. So, now you see how complaintophobia makes a person fear being complained about.
To get rid of complaintophobia, one must dare to be responsible for one's own actions. If everyone can do that, then this world will have fewer complaints about complaints. I don't hope to offend anyone by this blog entry. I might have been stereotypical. Anyway, thank you for taking time to read my "complaint"! And I hope you've learned a new word too!