How to remove, delete, or uninstall ALL the installed software?

I would like to remove or delete or uninstall ALL the installed apps or applications or programs or softwares from Linux... My computer is slowing down because I have installed a lot of useless softwares and it would take a lot of time to remove them one after the other by sudo apt remove. Is it possible to remove them all at once. However, I do not want to remove the essential softwares like Firefox web browser, etc. How to remove and clean my linux computer?