While Delfos does sometimes take issue with matters without suggesting an alternative, in this case he actually has. Whether to call his comments "complaints" or "proposals" is missing the point: the question is whether they are constructive or not. His comments are not unconstructive for the reason of not proposing an alternative.
It's not an alternative I agree with, and it's one the region did not vote for, but the alternative of not having a Citizen-Sergeant lead the Militia is an actual alternative to the adopted legislation.
That said, it's not the fault of proponents of the adopted legislation that an alternate proposal was not written up as a bill and voted on. The proponents wrote up a proposal, adjusted it in response to comments in ways that made sense, and then asked for a vote. The Ecclesia voted to adopt the proposal. They had no obligation to put forward a proposal they would not agree with.
I'm not sure that Delfos' comments in this topic have been constructive: this topic was about whether a specific military action was legal. The discussion of whether it should be legal is separable. It's also unreasonable to say "I told you so" when A) Delfos did not oppose having NCOs under the Sergeant specifically and B) no argument has been made as to why the Citizen-Sergeant shouldn't be allowed to delegate running an operation at a time they are unavailable, or otherwise.
Finally, it's not prejudice, Delfos, when someone has known you for years. Allama's complaint, however direct, was not based on a preconception of you without specific familiarity. I wouldn't say you only ever complain. As I said just now, you have actually proposed alternatives many a time. However, reviving previously settled questions and challenging laws and policies without actually proposing alternatives can definitely be unconstructive, and you've made a habit of doing so from time to time which I've seen people find frustrating.
I hope my long digression was constructive, and not further derailment.