The best thing you can do is just leave the squad as others have said before. I don't think reports have any power in this situation, but if you feel like you can just go for it. I would just leave and find a new squad, it doesn't worth my time. I don't understand why they afk tho, you gain no experience (affinity, focus, etc) while doing so. It is a somewhat new thing tho, you gain zero amount of exp after a while if you don't do anything (deal damage/take damage), after a minute or so iirc.