I don't think Crusade is awful per se, but after watching it recently, it's really not a very good movie. I used to love it, but it really does come across as an Indiana Jones spoof. Though Raiders definitely had humor, it seems like every other line in Crusade is a joke.
I can't comment on Temple of Doom, because I haven't watched it in 10 years. I can never get in the mood for it. When I want to watch me some Indy, it's always Raiders.