1 Your disability allowance should be judged according to the standards of Shenzhen. Because Shenzhen is your place of residence, your living standard should be higher than the place where the car accident happened. According to the relevant judicial interpretation of the Supreme Court, the judgment should be based on your residence. The specific explanation can be searched online, so I won't copy it here.
As for your suspicion that judges, lawyers and the other party collude to eat compensation, in fact, many parties have this idea when they go to court. However, such problems generally do not arise, because the law can only stipulate one big principle, and judges are different. Sometimes, different understandings of the law will lead to different judgments.
The scope of compensation includes the living allowance of the dependents. The lawyer you hired should have done nothing wrong, because you need evidence to prove whether the dependent you mentioned is incapable of working and has no other source of income. If you need to raise, are there any other dependents? If your evidence is not perfect, the court will not accept it. If you insist that the most basic investment is that you pay more lawyers' fees.
Finally, once again, the above opinions are for reference only, and I hope they will be helpful to you and adopted.