I went through and bolded everything about this response that you need to read, and read, and then read again until you get it.
You're welcome.
M+ is widely considered to be the best thing about Legion. It fixed the problem of 5 mans becoming irrelevant a week into the xpac, and it gave people something to do that continually gave them a suitable reward after. Just because you hated it doesn't mean everyone, or even close to everyone, did (which is something this forum could greatly learn from, but will never).
It definitely had some bugs, and I think they're fixing it, but it was a great system.