Ah, so we're judging Steve Tandy on his 2020 Scotland performance, rather than his 2019 Waratahs performance? I seem to recall we weren't a defensive juggernaut on our way to a 12th place finish.
In reality judging specialist coaches from afar is a mug's game. Sure you can make some wider observations but it's hard to actually know who is good and who is lucky.
If the Wallabies miss 35 one-on-one tackles in a game, is Taylor a bad defensive coach? Maybe, but maybe not. Coming on here and saying coach X will fix all our problems because he's better than coach Y just rings alarm bells with me.