Of course he didn't. That's the point. This season mirrors 2012 in that the rotation was a shambled. Bello is the only starter who didn't go on the IL (nor was relegated to the bullpen--Pivetta).
When 2013 rolled around, however, the Sox didn't just have Lackey. They also had Lester and--surprise, surprise--Clay Buchholz, who went completely ape in the first three months with 13 quality starts in 16 total starts. That year Lester had 20 quality starts and Lackey 19. Plus Koji Uehara in the bullpen. The pitching was transformed--and that carried over into the postseason.
I don't see that happening in 2024, but agree with the consensus that job one is to fix the rotation.
Bello with 15 quality starts in his rookie season is a good start.
I think the Sale comeback this year, despite missing over 2 months, was promising. He was fantastic in May (4 starts, 26.2 innings, 3 quality starts, ERA 2.42) and almost decent in September (5 starts, 25 innings, ERA 2.88) when he ratcheted down his fastball to the low 90's. He turns 35 in March, but he basically rested 3 seasons, 2020-22. I think he could go 150 innings next year and just maybe 15 quality starts.
So theoretically the new Sox management only needs to get one quality starter for next year. Two would be better, but the Sox also need to make other fixes. My biggest concern is with righty bats. Story needs to come around, but they also need at least one more .800 OPS righty bat.