Canon "M" lag and focus disappointment

First, you should know that I've had Canon equipment since God was a boy.  It may, or may not, be better than other brands.  I don't know as I've never had other brands, and I've been very happy with Canon.

Second, when we decided spur of the moment to go to Hawaii last week (there are some advantages to getting old) I didn't want to lug the weight of my 5D Mk11 and so off to the photo store I went and came home the proud owner of a "M" camera sure it was the greatest thing since sliced bread.  Perhaps it is, but I'm shocked at the shutter lag and the problems it has focusing.  If I'd bought an $80 point and shoot I'd have expected better focusing and far less shutter lag.  I'm astounded that in 2013 a camera can balk like this one does.

I still have much to learn about using it, but I doubt the shutter lag is going to get better, or the camera focus improve.  The focus is especially bad (I don't mean iffy, I mean bad) in low light  ---  even when the focus assist light is booming away on a nearby target.  I was off today to the Volcano National Park and the M wouldn't focus on the plume of smoke from the caldera.  My old S80 wouldn't have any problem with that.

My next camera will be a Canon, as will the one after that, I'm sure, and I'll probably buy the M Mk11 when it comes out (the M idea is a great one) in the hope problems have been solved, but Canon has burned a bit of the bridge with me.

Why post this here?  Simply that the dpreview community has been a great resource for me in the past and I feel I owe it to other Canonites to pass along my experience and comments.