Mastodon can be janky and it is honestly hard to use, especially of you never used Twitter either. For me, Libreoffice does its thing and ocuppies much less space and less intrusive than Microsoft Office. Open-source projects tend to be less polished than commercial ones due to lack of funding. 98% of open-source projects are completly free, while things like Microsoft license keys cost the price of a lower-end computer
Sideloading apps to ios is still a huge difficulty. Also, not possible to access a terminal to the underlying system. No way to modify audio output. All of these are basic things on android.