The issue comes down to whether or not the settlement was equitable. If there was a settlement, then his preparation had little to do with it. You might want to take the settlement to another attorney to have it reviewed to see if anything was done wrong.
Not everyone always gets everything they want, and no attorney would ever promise any particular result in any litigated case. Indeed, initial consultations usually only involve hearing "your" side of the case, later events revealing that things were not as clear as you originally stated. There certainly appear to be communications issues. If you feel you should have obtained a better result but were somehow misled by the "unprepared" attorney, you may seek fee arbitration with the bar association. The difficulty in these cases is you must prove a "case within a case", and you should consult with another experienced attorney before doing anything else.
Disclaimer: California attorney Robert Miller has practiced for over 45 years and restricts his practice to real estate and probate matters in the Central District of Los Angeles. Any opinion expressed is for general informational purposes only, no attorney-client relationship is intended or created by this answer, and no action or inaction should be contemplated without first employing and consulting with a competent attorney convenient to the questioner.
Unfortunately, once an order is made, it is very difficult to undo, especially where there was a settlement involved with two attorneys. It is unclear what monies you are talking about, but if you are referring to spousal support, perhaps you may still be able to go back and modify the amount in the future. If you feel that your attorney was unethical, the state bar has a panel set up to investigate your allegations. Family law is a very difficult area of law, and things do not always go according to plan, nor does it always turn up roses. Consult with another attorney and get a second opinion before proceeding any further. It is very difficult to second guess another attorney's actions because we were not there.
It is hard to say anything meaningful to the client who complains that his/her attorney "influenced" a decision. Such "influence" is a very large part of the attorney's professional duty to the client. Influencing advice and analysis is exactly what the non-attorney client needs and pays for.
It also makes no sense to complain that your attorney did not warn you about the possibility that a settlement might be offered. In many circumstances, there is no advance warning by the opposition of an imminent offer, and your attorney very likely did not know that the prospect of settlement would come up that day. But you and your attorney both inevitably knew -- and talked about -- the fact that the case was likely to settle at some point. A very tiny percentage of family law cases actually go to trial. It is not likely that you were wholly sand-bagged by the unexpected issue of a possible settlement.
But even if you were: an offer was made; you and your lawyer had a discussion about it; and you made a decision. It goes without saying that it was a very difficult decision that took into account a great many factors, tangible and intangible, and many with psychological and emotional complications. Now you have buyer's remorse. That is common, and it is understandable. But it is not the fault of your attorney, and it is not -- without more -- suggestive of an ethical breach by your lawyer.
Divorce is a mine-field -- psychological, financial, social -- every conceivable kind of loss and hurt has been experienced. It is understandable and human to want to lay off your doubts and anxieties on your attorney. But that doesn't make it sound or right.
Your best course at this point is to obtain a second opinion and perhaps also some skilled psychological support services.
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