I would like to install excel, word and powerpoint without windows, because carrying my giant laptop to uni is less practical than the tiny steam deck and a small keyboard. Is there any proton magic that allows me to install the programs? I don’t care about one drive and online features.
You can always can use the web version. Also, let me suggest you OnlyOffice, which is open source and aimed to maximice compatibility with Microsoft Office. I’ve never been a hardcore MS Office user, so for me OnlyOffice is basically the same, down to the user interface.