Points 1 and 2: I do agree that you don't have any solution in this particular match. And that single handed inexperienced actions are completely irrelevant. But these views are very shortsighted of the bigger picture of increasing the quality of matches on your DC over time. Player skill/experienced isn't gained instantly from reading a guide. It takes a lot of time, practice and willingness to learn in combination with said guides. And in the case of new data centers, it is also a communal effort to collectively raise the bar for everyone on the data center.
All of the resources I've mentioned were built up over time by an entire community of contributors among each data center. As more individual players take it upon themselves to improve their own play, the skill floor will gradually raise as well. People on Aether used to server travel across all the servers on the data center promoting PvP discords, events, guides, etc. for years. People joined up over time and the entire skill level of the data center increased. Eventually, pre- and early ShB there were so many commanders that they'd legit be fighting eachother for the dorito marker to lead the alliance. And as I've mentioned before, 48 randoms can indeed steam roll 8 players on voice. All it takes is a single experienced commander and a baseline level of skill from the rest of the alliance of randoms.
Are any such efforts being made on Dynamis? If not, why not? The hard work has already been done. The guides are already made. Disseminate and promote them within your data center.
Point 3: There are definitely people who will help you learn if you directly and personally reach out (myself included). However I do agree the general NA community tends to be just as toxic as they are helpful. I say this with the caveat of only being in the PvP Paisa discord. There are great people in there but its also used a lot for post-match ranting about how bad everyone else on your team was in Feast/CC which is definitely off-putting for new players especially with how fragile the XIV community is in general. I made a few great friends from the discord and never needed to join one again, so even if you don't like discord groups they can be great for finding training partners if nothing else.