Call it whatever you want.
None of us know what the plan has been or will be.
If the organization decided to build up the foundation before spending money or prospects on pitching, then I guess it is an excuse, and maybe even a valid one for Bloom but maybe not those who made that choice.
If the choice was all or mostly on Bloom, then he deserves the blame, of if it ends up working, the credit.
IMO, we were not an ace away from top contention, on paper, in any year under Bloom, so looking at the best way to plan for 4 years or more is a context that can be debated from all sides.
Look, I'm always for adding to the top of the rotation. It would have been more fun watching the Sox over the last 4 years had we had decent rotations (and pens in 2020-2022.) I'm just not sold on the idea that the correct order for a 4-5 year plan is to start with pitching. By the time we reach the "window" the pitching would be in decline.
Not allowing for a complete teardown and rebuild only complicates the rebuild, too.
It's not a simple situation to judge, IMO.
I fully understand why and how others can and do judge harshly.