From reading your following posts, I would say that your issue should be with the law around parental responsibility, rather than social care. I also think you have a very biased and one-sided opinion of social care.
Many SW do understand coercive control within DV relationships. However, going to a refuge is an optional decision for the woman. It is strongly advised repeatedly. I'm sure you must be aware that a woman has to be ready to leave that relationship, and as you said many are not due to the 'brainwashing'. It can take multiple attempts to leave and YEARS. Social care cannot force a person to make the decision to act in their own best interest. Its like expecting the police to stop a victim of DV returning to their partner days/weeks/months later after they've been arrested. As an adult who is not sectioned, you have to be responsible for your own actions.
The priority in this situation is to protect the children from harm. So although it may be coercive etc the woman is putting her needs or her partners needs above those of her children. Why should they wait years for the mum to be ready?
Yes there are some terrible SW who don't do a good job, as there is in every job sector going. They are not the majority. From the sound of it your job is to pick away at any mistakes that are made, in order to say that the SW evidence cannot be upheld due to these mistakes. As you mentioned, it's no secret that social care is vastly underfunded, with SW having high caseloads and therefore having very high thresholds. From what you say is your experience, you should be aware that it takes a lot for children to go into foster care. Multiple professionals have to give their opinion and evidence for that to happen. Not just the whim of a social worker who is 'over-zealous' expectations with crap evidence.
As for the father being present at the meetings, they have to be invited if they have parental responsibility. No it's not ideal to be in the same room but with the amount of professionals involved, they can't have 2 separate meetings. In my area many of them take place via teams so no need to be in the same room. However, it is important to note that mums are also the ones doing harm, not the dad. It would be bad practice by automatically assuming who is in the wrong without evidence. For the sake of the child, both need to be listened to.
Usually the mother has the main caring responsibilities and want to keep the children, with the Dad having little or supervised contact. So yes, if the parents aren't together, the mum is the one having to make most of the changes and attend groups etc to prove they are capable of putting the children's needs first and make the right choices to keep them safe.
Coercive or not, making the choice to return to an unsafe partner because they are afraid, dont want to be alone or not coping financially is NOT putting the children's needs first. There are sadly many mothers who are not vulnerable or in controlling relationships who do not care about their children's needs.