Unexpected Shutdown MacBook Pro Retina 2015

One day, my MacBook shut down for no reason. Then I restarted. Began to work on it again shut down within 10 minutes. Repeated for 2 weeks then dead for 3 months. Plugged it in one day after the 3 months and left it plugged in, mind you there is no light on the magsafe adapter, it was like dead (and more about that in a minute). 2 days later it chimed. I ran to it and the indicator light was green and the mac worked. For 2 days. Then back to the same thing. I did all the stuff again and it worked then shut down then worked then shut down, I even factory reset during that time and it was working great for those 2 days but stopped and randomly every now and then. Now its been at least 6 to weeks, and it is completely shut down. I have tried everything and nothing works.

Now here is the kicker, where my frustration with Apple comes in, is that I took it to "genius" bar and the guy told me Apple couldn't do anything because it wont turn on, so he suggested I toss it and buy another one?!? And attempted to get me to buy a new one from him, there since I was already at the Apple store. This mac is not even 3 years old yet. And honestly, as much as I paid for it, that was a kick to the face. Why would I want to purchase from Apple after that experience. I already had to replace my IPhone 6 battery due to it's mysterious shut downs after 2 years, makes me wonder why the unexpected shutdown from my mac after 2 years and the inability for Apple to fix it.

About the indicator light on the magsafe adapter. After the shut down then it worked for like 2 days, it was doing something weird with a green light then orange light then green, back and forth. But I could not resolve either, and yes I have tried different magsafe adapters and none work.

Apple, what is wrong with my expensive MacBook Pro with Retina?