That's unfair. The majority of the scrums collapsed and were reset because there was no fault. Then the penalties came from the short periods of open play. He warned Wales a yellow card was coming if another scrum was collapsed illegally. Then the try came later.
I think you're being unfair on the ref there. Also, his nationality has nothing to do with it.
The HAI takes longer than the 10 minutes they had for him to come back.
There's a reason his has only happened once - the rules largely work. Why change World Rugby's rules based on one outlier?