tl;dr: I am considering leaving my current PhD program ABD, after four years, several publications and a strained relationship with my bully advisor. How, when and do I explain why I'm leaving if I apply to other PhD programs (in different European countries) and would it be considered a red flag and mean an outright rejection?
Wider context: I am a PhD student in an STEM field at a European university, currently in my fourth year. Over time, I have become increasingly disappointed and disillusioned, and I have been pushed around, bullied and slaved away for minimum pay. My relationship with my advisor is becoming worse all the time. They are a very self-absorbed person and a bully, but very well connected in the University. I have worked very hard for them not only on my PhD but on numerous other tasks that are not even related to my job. I completed all the formal requirements for graduation but my advisor keeps stalling because they need someone to work for them cheaply and the PhD dissertation is strong leverage.
Now I decided I am ready to leave my job and my PhD without graduation as it has become apparent that they will not let me finish no matter how much more I do.
I was thinking of applying to other programs, but it will be obvious that I was already a PhD student, as I can't just leave it off my CV and the publication track record will also be there. My question is, will quitting my program ABD and applying to another be a red flag? Do I mention anything about why I'm leaving and when? I have no intention of bad-mouthing my advisor to anyone (except obviously you strangers on the internet), so how do I explain my leaving without coming across as a whiner and a quitter? Or should I just give up and get a regular job?
P.S. I read this question which might be a duplicate, but there the student quit while having a relationship and contact with a specific advisor at the new university, while I am just thinking of applying to several calls where I do not have any personal connection with the people hiring. If people here think it's still a duplicate, I will agree.