Setup of VSCode - messed up : how to get back to a fresh setup?

Setup of VSCode - messed up : how to get back to a fresh setup?

hello dear community,

i have VSCode running on a Linux-box (as VSCodium) - but at the office it runs also - on a Win10 - system.

the setup of my VSCode is somewhat messy. I have set it up years ago on a Win 10 pro

purpose: i want to code in python.
but there were added some extensions which messed it up - arduino-extensions and

platform.io and other things more
i guess that i have messed it up

question: how to check the whole system - and get rid of all the mess and the thing that i do not need any more.

see some insights https://imgur.com/a4QB6K7