I think he's boring (I'm a 2 hdcp, not sure why that matters but someone asked). The charisma thing as stated above, can't define it but know it when I see it and Scottie doesn't have it. Tiger, Rory, Bryson have it in spades. Guys like Justin Thomas, Fleetwood, Hovland, Lowry are extremely cool guys that are just fun to watch, not 100% sure why.
I do know why Scottie is not fun to watch. His swing is awkward and ungainly looking. His feet are all over the place, he doesn't finish in balance half the time, looks like a 10 hdcp. I know he is elite in clubface control, low point, ball striking, but it isn't pretty and golf on TV is for entertainment and grace and beauty are entertaining. Rory's swing is pure poetry and I could watch it all day. I've never agreed with whoever said "It's not how, it's how many" (Karl Marx?). How matters. I could watch Rory hit it all over the lot and shoot 75 and be hanging on every shot! Bryson's swing isn't conventionally pretty but it is graceful, well-balanced, highly athletic and very pleasing to watch--especially when he hits it over his house for a hole in one.
Scottie cuts nearly every shot (because he has a little "over the top" move) and that is not an aesthetically appealing move or ball flight. A draw with a little inside out swing path is pretty. Brushing the ball off the turf without a divot looks cool and is cool. Digging a trench looks like you're digging a trench. Not as cool. Most of your D 1 studs and club champs are natural drawers of the golf ball. 20 'caps all slice. He just plays the same cut 90% of the time. He's not the longest hitter, not the best putter, the only thing he's best at is distance control with his irons, which is great for making money, and something I wish I was that good at, but it doesn't make me go "WOW! Pin high again!" Even though the announcers were trying to rave about it, it's not great TV.
Oh and he's a "great strategist" which another way of saying he plays very boring high percentage golf. That is good for making money and putting me to sleep. I want to see the risk takers and gamblers, the go-for-broke guys!
Players like Tyrel Hatton and Lowry who show real emotion are very fun to watch. I like it when they destroy tee-markers. It shows they care and not just about making money. I hear what a cut-throat competitor Scottie is from his friends. But I don't see it on the course.
So, to sum up: lacking charisma (whatever that is, that thing Tiger, Rory, and Bryson have in spades!), having an awkward and ungainly looking golf swing, hitting a mild slice most of the time, not being either an amazingly long hitter nor a fabulous putter, playing very conservatively all the time, and showing zero emotion on course adds up to BORING!
Flame away.