A couple thoughts here that don't necessarily connect together.
* This year's team so far has underperformed expectations as a collection of individuals, basically the truly unexpected positives so far have been Busch, Shota, Brown(when healthy), and I guess Tauchman. Some of that is a coaching or scouting/roster building responsibility, but also most of the noteworthy underachievement has come from those with established track records(Swanson, Hendricks, Neris, Morel) while the aforementioned successes have been those with the widest band of outcomes. It was (and to a large extent is) logical to expect better as a collection of parts.
* There is no roster building plan that can seamlessly cover half of your preferred bullpen being hurt, including most of the back end of the pen. It especially can't when one of the back end guys was terrible(likely the precursor to injury) and the one healthy late inning option has underperformed about a decade of steady production. And it especially can't when the rotation also has below average injury luck thus far in the year. Jed should do something external here the moment it's possible, because while Merryweather is getting closer, Almonte just had a setback, it's radio silence on Alzolay, and while we can pine for Roberts/Bigge/etc, there is no likely internal savior(or at least not enough of them).
* It boggles my mind how so may people appear to hold the simultaneous thought in their heads that they are furious how long it has been since the Cubs made the playoffs, or call this a X year rebuild, and yet with the team 3 games out of a playoff spot in June(with plenty of reason that small changes/health can improve their fortunes) we immediately jump to 'must sell' mode, tear it down, etc. Bellinger has very little trade value, and the main value of trading him would be to free up money(maybe not as much as you think) to use in free agency on players with similar or worse expectations/upside. If the Cubs pen were 15% healthier, and there was a rumor that Justin Steele's clone was available in trade, we would clamor over the thought of adding him as a long term piece that would also boost their playoff chances. It is lunacy to think a team in the current situation should entertain that thought.