I don't think I've ever seen TdG have a complete performance
Do I just have bad luck at watching him?
Yes, he's had a few where he's been immense, vs Sarries stands out this year, and a few in the covid seasons.
Fewer since JvG arrived, but then, JvG brought a personal favourite FB with him, so last year Tom's game time was much more limited, and this year he's fighting for his place, and often over-playing.
Normally you'd say that wasn't too bad a thing, his versatility would make him nailed on for the 23 shirt, and enough gametime to settle down - but again, JvG does love him a 6:2 bench, so the 23 shirt is usually the backrow replacement.
Conversely, I'm sure I have, but I don't recall seeing him have a bad game personally (plenty as part of a bad team performance, which may mean that he did, but didn't stand out as such)