Many thanks for posting this. I know what you mean about being crazy busy!
I think there are a number of factors at work here. Number one is that this is basically a vanilla jpeg (output) shot in the Faithful picture style, with not only Zero Sharpening applied, but also Contrast set to -2 (keeping in mind that Contrast is a component of sharpness too). The White Balance is also way off, and that will affect the perception of sharpness as well. I do think you have a workable image here (esp since you still have the original RAW). It just needs some more TLC.
Like Larry and others here, I very highly recommend DxO Photolab 6 (and its Deep Prime XD) in order to get the very most out of your RAW photos. It's powerful stuff, so you have to be careful to apply it judiciously or else you'll create entirely new problems for yourself. ;-)
Also at work here is the jump from Canon's 24 MP sensor to the new 32 MP sensor. It's a tough transition. I remember almost gagging at my first picture sets! Wondering, like you, if I had in fact made the right move. The good news is that it just takes a while to get used to the new output, and moreso the fact that the new images need to be treated Entirely Differently than the old ones. Once you get a good workflow established, you'll start to see these images as the new (and improved) normal. And yes, I just went through the same painful process a couple of years ago with my (45 MP) R5!
A couple of other notes: 1. Keep your shutter speeds up when shooting people performing activities. This will help with camera shake as well. You have plenty of leeway with the ISO here (esp when using a good RAW converter). 2. Shoot bursts. Not only will you get more poses to choose from, but there is always one frame that is sharper than the others. In fact I call this "Poor Man's Image Stabilization." You can easily gain a stop (BTW I always use the back LCD for composing with my M6ii in "diaper mode" :-) ). 3. Stopping down the aperture will increase sharpness a bit, and also provide more depth of field (you only have 7 feet of DOF to work with in your shot). 4. Using Back Button AF (in Servo) + Spot AF will help to keep what you want in focus. Shooting like this, the M6ii produces close to a 100% in-focus keeper rate for me with some of the toughest subjects on the planet.
So see what you can apply to your current technique and workflow. I think you have a good combo here. It just needs some further TLC. Happy shooting!
J&H