I think you're conflating a VIP getting favorable treatment to your family getting normal treatment. I imagine that other people who went to the same places your family were seen at recieved other treatments if they had worse presentation. If your family worsened they should receive other treatments as well. Hopefully they will have a mild version and fully recover, and if they don't, and nothing is done, someone needs to step in on their behalf and escalate things.

My great uncle was in critical condition, once again - oxygen and useless antibiotics. And about subpar treatment, that branch of family has 3 doctors and couple of nurses, he was actually treated preferentially.

Can you speak to his doctor, or ask a close family member to? If he's being given antibiotics for no reason, that should be reported. On the flip side, especially with covid, doctors may try to aggressively treat anything else present because it can complicate things and because bacteria are largely something we can treat, especially compared to covid.