The left menu as it is :
- Not User friendly, just icons, with no bubble info while hover it.
- user looking to collapse the menu and see more details and the big burger which looks like the logo of the app is not the appropriate button to collapse the menu
Instead :
- Start the menu collapsed for better visibility
- Put a button with arrow left on the bottom of the menu if user want to wrap the menu.
that's my opinion Guys :-D
/Peace