Once they have hit the point where they hand in a resignation you can't do much about it the time to have done something was before when they complained about s

Once they have hit the point where they hand in a resignation you can't do much about it the time to have done something was before when they complained about something. The failure to fix the problem is where the problem lies and now it isn't just about the problem(s) but also how they were handled which has meant there is little trust. Maybe a higher pay offer retains them for 6 months but the wound is still there and its likely never going away.