I'm neither an Apple nor a Microsoft user. There is no need for me to criticize either of them (especially from a standpoint of a non-user with limited knowledge). I just ignore them and go on my own way. I'll leave the complaining to people who actually use their products.
On the other hand, I can see complaints from non-users on the basis of compatibility. I do get tired of people saying "send me a Word document" and the like, but they just get whatever LibreOffice puts out and that will have to do. It generally becomes a non-issue. (I don't deal often with complex formats that use every feature on the menu.)