Exactly this. Here's an example of a Friday night home game in 2003. Take a look at that attendance number.
https://www.baseball-reference.com/boxes/MIL/MIL200305160.shtml
Not only have they not won a super bowl in the last seven years, but with this roster it appears this is the furthest from super bowl contention they've been under current management.
Earlier in the year they were using Ashby and Patrick among others consistently in 2+ inning outings. Lately they haven't been doing that as much so they're burning through the bullpen quicker