Scooped and left alone by PhD advisors. What are my options? I am a PhD student in the best-ranked university in my country (not America or the UK) and pursuing my research in a field that I am (was?) passionate about. All was fine for a couple of years - I loved my work, did fruitful experiments and presented a paper at the best conference in my field. I also successfully defended my PhD candidacy and got good comments from my panel which boosted up my morale significantly. 

Things started going downhill from this point.

I had enough data to publish in a journal just three months after I had presented my conference paper. So, I prepared the manuscript and sent it to my advisors (I have two). Without even bothering to read the manuscript, they wanted me to aim for a journal with a higher impact factor rather than the one I was targeting and so, they asked me to pursue a few more experiments. After four more unsuccessful months, I get the news that a similar work to mine (same experimental design, same goals) was just published by a group from another university.

Now, my advisors turn into PANIC mode. They accused me of being too slow and not making enough effort. In fact, they didn't even remember that I had sent them the draft manuscript four months ago. 

My relationship with my advisors turned sour after this. They did not respond to my emails calling for meetings, failed to go through important presentations and never responded positively to my ideas. In the midst of all this, I lost my grandmother and they didn't even offer a word of condolence (perhaps I'm expecting too much?).

Furthermore, I was working on another side project which also gave promising results and was accepted to a prestigious conference. My advisors did not have a look at the draft manuscript for this conference paper, hardly offered any comments or suggestions and did not respond to my email asking them to have a look at my presentation. I travelled alone to the conference (to another country) and presented my paper without any feedback from my advisors. After returning back, they did not even ask how my presentation went. 

As a result of this and more, I have gone into a depressive state, lost my motivation for the field I once loved, become a social recluse and lost out on my mental health. It has led me to ask myself "Why did I join this place?" every single day. I have even sought professional help from a therapist but that seems to be of no help.

Apologies for the long post but any advice will be helpful. Criticism is welcome. Thanks for reading.
Non-responsive/bad advisors seem to be the rule rather than the exception in acadamia.

Switching programs will probably only result in switching to other bad advisors and cost you enormous amounts of time for little effect on the results. Dropping out because a handful of people aren't as helpful as they once were would be foolish as well.

Finish your PhD and move on.

Lastly: Keep working with mental health professionals. You said you're depressed and seeking treatment. I'm glad you're getting that medical condition checked out. Sometimes that treatment can take time to take effect and get some relief from it. You might also want to interview some other professionals to see if they might have a better diagnosis or treatment plan for you.