Trade all the good players and fire the rest. This team's future is as bleak as it's ever looked. All of the cost-controlled young players are giving the team exactly what you'd expect from low-cost options: not much. So far, Campbell, Mayer, Duran, and Rafaela have disappointed, Anthony's been okay (when healthy), Wong never panned out, Narvaez's good rookie season seems like an anomaly, and several of the young pitchers (Crawford, Houck, Bello) have been bad and/or injured too often. Maybe keep Tolle, Early, Anthony, and Crochet and trade everyone else.
It's definitely bleak, but I'd disagree about Rafaela at least. He's arguably the best defensive CF in the league and is hitting .281 with 15-20 home run power. Not a superstar but someone you're very happy with when he's batting 7th instead of 2nd, and not overpaid.
I never much liked Bello, he always seemed like the classic immature case that was going to have one issue after the other, even if he was pretty good for stretches. If you fix his yips or whatever is going on, someone might bite. His contract is reasonable for the upside if you can get someone to buy into a change of scenery, but man, he's in AAA right now. Not exactly a selling point.
You can't really gain anything from trading Campbell or Mayer with their values at an all-time low. Mayer seems like one of those classic top prospects where you look at this pro numbers, and he's literally never been very good, just ok, and kept getting promoted. When did he ever hit, since high school? Campbell got hot for half a season and probably should be a AA player with the holes in his approach, but we already rushed him to the majors. Whiff.
At least our young pitching has been a life saver. Tolle and Early should both be in the rotation for years. Bennett is still figuring it out, but has a chance to stick as maybe a young #4 guy? Eyanson should be up next year if things go well, and Crochet will be back. Suarez is solid. "Pretty good young pitching" is not nearly enough to save this roster, but at least it's a hard piece to get that we already have.
Beyond that, who knows. We need Anthony to come back and play at an All-Star level, and add another bat. A pathetic lineup that makes say 3 significant upgrades can be above average pretty quick. One can hope. If we were still a major market team we'd just buy at least a DH that can hit 40 homeruns, or stick a big bat in RF and trade Duran for an infielder. Etc.