I have suffered personally the lack of EQ with a colleague that, at the time was my immediate superior/project manager. Since I was a junior member of the team, I decided not to speak to our unit manager about it as I felt it could negatively affect him. However, after some time, it became clear that this colleague's behavior was taking its toll not only on me, but also other junior team members that worked with him. We were lucky enough that a more senior member of our team (i.e. another project manager) realized what was happening and decided to bring it up to our unit manager, as he understood that this was creating a toxic work environment. As a response, our unit manager called for individual, confidential meetings, with all the junior and senior staff who had worked with this particular colleague who lacked IQ, which convinced him that there was indeed an issue with this person. As a result, he took some measures to ensure that this colleague would get proper coaching/training and showed a change in attitudes before he would be considered for any promotion. In addition, he allowed junior staff who did not feel comfortable working with him to change project teams. In a nutshell, it was the action of a more senior team member that made our voices heard and enabled change. So my suggestion would be to act as the "voice" of your junior colleagues, maybe suggesting to your manager that they would be willing to come up on a confidentiality basis to discuss their experience (if they have previously agreed with you that they would do so). Hope this helps!