The discussion started with someone telling you "I have currently 2 browsers open and my memory commit is 370MB". Nothing about the concept of "modernity" (which is entirely subjective) there. Then someone else explicitly told you that "idling at 150mb" would entail swapping in a lightweight wm/compositor. You are the one moving the goalposts by insisting on a "modern batteries-included linux distro competing with macos or windows 11".

Nobody that you're arguing with ever suggested that "Modern Gnome and KDE distros with batteries included" would give you that experience. They only told you that it's available on Linux. That said, as I told you, Mint/Cinnamon uses considerably less than what you report (which surprised me), and you can do much better than that out of box (like, say, Mint/Xfce).

Nobody "threw bs accusations without facts" at you. You are the one accusing others of "bad faith" argumentation (despite the fact that even if others were doing what you claim, it wouldn't meet the definition I already gave you).

Please stop.