will someone PLEASE tell me how to properly post their games on here like everyone else seems to??


You need to use a browser.
https://support.chess.com/article/316-how-do-i-put-a-game-or-puzzle-in-a-forum-post

so copy PGN.
Go to a thread, like This one.
Click (in the upper place where the text box ('Please be relevant and kind...') is) the "insert chess game or diagram" button.
In the diagram box, choose Load from PGN.
Paste the moves (Ctrl + V)
Click Add Game(s)
(if the diagram is too big and you don't see stuff, click Ctrl + '-', this shrinks the screen, while Ctrl + '+' will make it big again)
Click Insert
Click Post

You can't do it if you are using the chess.com mobile app. You have to log into chess.com in a browser and do it from there.

You can't do it if you are using the chess.com mobile app. You have to log into chess.com in a browser and do it from there.
bs i can
There are some app features that load the site in an embedded browser. So technically, you can access the website version of the forum through the app and use most features. However, it's not something natively possible in the app through its forums feature.