ZD, he never said she hated his guts. The fact that someone wants a divorce does not necessarily mean that she hates her husband. I do agree with you in principle that it is probably not a good idea to stay married to someone who wants a get, and your advice is probably wise advice for the majority of situations, but I am not sure there is enough information here to assume that it is accurate for this particular situation.
Sometimes things can be worked out, and I think that most Rabbanim and therapists would agree that it is kidai NOT to get divorced too quickly, and to try to see if things can be worked out first, particularly if there are kids involved.