The AL Central is a weak division, challenged only by the even less impressive AL West. If the Twins can't be competitive in the AL Central, they are, by definition, mediocre (or worse).
Personally, I think Shelton has done a decent job and deserves to return. Three years is enough time to see how he handles a MLB roster.
Pitching is the key to winning. This year's injuries to pitchers killed any chance the team had to challenge for any post-season success. Last year's house cleaning, particularly by getting rid of Varland, Duran and Jax, decimated the bullpen and it has been as bad as expected.
The position players? This team has no real stars. Buxton has been the most talented player but can't be relied upon to play regularly. His age is increasingly a factor too.
Most of the other veterans than have had multiple opportunities over the past few years to step up. Some need to be traded/released.
The younger players currently on the roster (Keaschall, Lee, Jenkins, Ross, Culpepper, Bradley, Abel, etc.) should be the core next year. I think the fans wouuld rather see a bunch of hungry younger players than second-rate veterans.
Pohlad needs to provide Zoll with enough resources to field a better team in '27. This might/should include trading for a legit top-of-the-order SP.