> I have frikkin 2 different topbars that seemingly have similar options.
I am not sure exactly what you mean by "top bars" but my two top sets of menus are "Steam View Friends Help" and "STORE LIBRARY COMMUNITY <USERNAME>" which seem quite different.
> The fact that the store page often is a better look at the game than the one in the library.
You can go to the store page from the library! Why would you assume you should re-explain the game to a player? I think reminding you of when you did things in the game makes a lot of sense. I wish it listed playtime and not just achievements.
> Impossible to see what dlcs that is enabled unless you happen to borrow the game from someone in your family.
I do think their DLC display is bad, but it's far from impossible. Properties -> DLC shows you all your DLC and which is enabled. Also clicking on the DLC tab does show you which you own (and all the ones you own will be enabled by default).
Like I said, I think steam has a lot of problems, but I don't understand your complaints at all. I would complain about the awful performance of a webview, the annoying behavior of store pages, the foolishness of the "All" tab on communities that mixes different kinds of content in one place but it will never change because people can't find it otherwise, etc.