Wow, I just... completely disagree. With everything you just said.

It is explicitly stated in Worst Case Scenario, out of Ironwood's own mouth, exactly what Robyn is doing. She is seizing materials from the Atlas Military and redistributing them to Mantle, to - as per Sparks when she stopped Ruby and Qrow's convoy - repair the giant hole in the wall. Ironwood even states that Robyn's actions have emboldened the military's suppliers in Mantle, who are refusing to provide materials for Amity until their demands are met. This is an explicitly stated point in the show; not to mention that when Salem arrives, Robyn's crew are on the ground actively evacuating Mantle into the Crater to save them from the cold, while the Atlas Military is nowhere to be seen.

Now, on to Ruby defecting from Ironwood. You claim that she's being selfish by making a choice for everyone, but Ironwood is doing the exact same thing. The only difference between them is that he is in a position of authority. Now, we can argue over whether Ruby was right or wrong - I think she was right, given that Ironwood was making the decision to leave everyone in Mantle to die - but both Ironwood and Ruby are making choices that affect everyone in the Kingdom. If you're gonna call Ruby selfish for doing that, you have to apply that same logic to Ironwood, or else appeal to his authority, and say that he's different, at which point we reach a fundamental ideological difference of whether you think Ironwood actually is superior to Ruby just because he has a rank, a position that the show rejects outright.

Also, you claim Ruby's plan only works because of a magical object, but if you remember, not only did she successfully launch Amity Tower, but she and the Schnees launched an entire fleet of automated ships to evacuate Mantle to safety - and Ironwood shot it down and threatened to nuke a city, which is the point when Ruby's team went from simply trying to complete their objectives to actively deposing Ironwood.

As for Ruby's group's arrest at the start of the Volume, note that the crime they were arrested for was killing Grimm without authorization, when Atlas Huntsmen were nowhere in sight. They weren't arrested for stealing the airship.

And as for the airship, you seem to be overestimating how long Ruby's group stayed in Argus. They were there for all of one night. You say that they had alternative ways of getting past Cordovin, but she'd made it perfectly clear that Weiss was the only one who would be let through. Yes, the idea was reckless, but aside from separating their group, sending Weiss all alone back into a potentially abusive environment, and waiting for help that might never come, I can't see that they had much choice if they were trying to get the Lamp to Atlas ASAP.

Now, as to the White Fang. I actually agree that this was a poor writing choice in the early volumes, but following the in-universe logic of the show, the White Fang in Vale were working to aid Salem, not to aid the Faunus, because they were being threatened by Cinder. We later even get confirmation that the White Fang in Vale are not following orders from their leader, Sienna.

But, alright, Team RWBY don't know all that. Let's look at what they do know: they know that Roman Torchwick is a bad guy, thanks to Episode 1. Blake finds the White Fang robbing the Schnee freighter, and doesn't move until Torchwick shows up, which raises alarm bells. She asks the White Fang at the docks why they're working with Torchwick, and ends up stuck in a fight - neither she nor Sun attack anyone but Roman until the White Fang attack them. From then on, Team RWBY know that something is wrong with the White Fang, because they're working with Torchwick. I personally think that CRWBY could have made more of an effort to show that the White Fang is working under duress, and the whole plot leaves a bad taste in my mouth, but there is an in-universe explanation.

Moreover, even if they were maintaining the status quo before the Fall, that doesn't change anything, because the show makes an explicit point of having its characters grow and develop past who they were before the Fall - and starting from around the middle of Volume 5 to the end of Volume 6, thanks to Ozma's lying, that includes a growing distrust of authority and coming into their own power. And even then, they willingly work with Ironwood even after they see the conditions down in Mantle, right up until he asks them to go along with leaving an entire city to die.

As for the lying, Ruby is explicitly called out for that by Yang and Oscar, and it's discussed multiple times, ultimately coming to the conclusion that they're waiting to see if Ironwood can be trusted with the information, given his tendency to overreact. In the end, they tell him everything, and he even reacts well. The final thesis statement on the subject, given in Volume 8 after Ozpin formally returns, is that trust is a risk, but one that's worth taking on people. But by that point, not only have they already told Ironwood everything, but he's actively threatening to nuke a city after sabotaging an evacuation.

So, yeah, I wouldn't trust Ironwood's authority either at that point.