Wellllllllll part of it is that the division is stacked.
By fWAR Toronto has the 7th best bullpen in the AL. The only non AL East teams with superior pens by fWAR are Detroit (by half a win) and Houston.
lmao
Yes, by ERA they rank worse but that's not a park adjusted, or luck adjusted, or strength-of-schedule adjusted stat so no sense looking at it
By K-BB% Toronto's pen is the 5th best in the AL, including better than BOS and BAL
Complaints about the bullpen are mildly overblown.
It's not elite but it's not actually a complete disaster.