Some people have made a case that all of psychiatry and psychology is based on fraud. In other words, most of the experts are charlatans or criminals.
Personally I think that dissociation is a far more fundamental part of MOST psychological problems that we have been led to believe. Which would imply that a solid understanding of the stages of dissociation would help in healing it, and likely similar techniques would work for any mental illness.
I know there are some that seem to be chemically caused, however there are two issues with this that are rarely addressed. Is the chemical imbalance caused by mental issues? Is the chemical imbalance in the brain causes/created by some other chemical contamination in the body. Fluoride? Aluminum? Mercury? A combo?
When it comes to full blown DID the people dealing with SRA Satanic Ritual Abuse are furthest ahead in treatment. For you, if it is affecting you, a good approach to start is to have a meeting of your alters, elect a leader, and then build a strong team where every member feels values but the leader maintains a solid external personality so that every alter enjoys the benefits of stability. This will mean that alters need to compromise. Maybe let the one who wants to run naked in the woods and early morning Sunday workout every week. And the horny one has to be allowed to pick up girls on Thursday nights. And so on.