OP, as others have written, we don’t know your story or why you seem to be so annoyed and distressed, or what kind of help you’d best need, now.
Experiences with the Disability Office (IV, AI) and the Social Services are... variable. Not only, like so many other aspects of life in Switzerland, from canton to canton or municipality to municipality, but also from case to case. Some people are doubted and subjected to disdain and even threats from the Disability Office or a social worker, while others are treated with respect and even get active help and their doctors' reports taken seriously.
The process can involve long waiting times. The Disability Office can set short deadlines for the applicant to comply with their requests while it, on the other hand, is not subject to the same system of deadlines in dealing with each next step.
The best things a person making a claim can do is to get help with keeping meticulous records ensuring they remain consistently polite neither provoking nor letting themselves be provoked complying with all the instructions supplying all the documentation required obtaining legal advice. The Social Services require information about income and expenditure and may require the same documents to be submitted several times, for verification. The Disability Office requires medical information.
As far as possible and if the doctors are open to conversations about the whole matter, the applicant should try to ensure that the doctors write solid medical reports, setting out: exactly which symptoms of which diagnoses cause which limitations how and why these limitations cause them to be unable to earn their own living which measures could yet be taken towards improvement, which others have already been taken and how they were or were not effective and why what is to be feared if the necessary measures are not taken and what the likely prognosis is. The systems of both the Disability Office and the Social Services, and all their jargon, can be difficult to navigate. Sometimes their staff are subjected to aggression by frustrated applicants. Staff working under stress contributes to high staff turnover, exacerbating delays and errors. Sometimes the staff members have to deal with the matter several times, either because their decisions are challenged by persons whose claims were denied or granted only in part, or because some doctors take a long time to write their reports, or medical conditions change and further reports need be submitted, or because the applicant does not or cannot supply what is needed to process the application. In some cantons, the staff of the Disability Office are put under explicit pressure to cut the amounts of benefits paid out. For matters taken to Court, there are long waiting lists causing further delays. If the Court find gaps or errors in the work of the Disability Office or the Social Services, that sends the matter into the next time-consuming round of assessment.
Altogether, I think this is possibly one of the worst aspects: when the matter - for whatever reason - drags on and on. It can be a frustrating and frightening process since, with the uncertainty causing additional stress for the person who, after all, was unwell and/or in need, to start with. The delays can strip resources, whether money or nerves, and that, in turn, worsens their health and can end up diminishing their chances of returning to gainful employment.
Try not to lose courage in what can be a long road.