Using commercial software without paying for it is, in general, stealing.
But here are a bunch of things that are not stealing:
Using commercial software on a country other than where it was made available for sale
Using commercial software after the vendor no longer wants you to
Using commercial software in ways the vendor doesn't like, such as on a device the vendor doesn't approve of
Using commercial software on multiple devices, provided you use it on only one of them at a time
Making a backup copy of commercial software so you don't lose it if the original copy is lost
Giving others a copy of commercial software that is no longer available for sale
Modifying commercial software to make it more enjoyable, such as by removing user-hostile misfeatures
Reverse engineering commercial software to learn how it works
Note that several of these items (such as cracking cheat protection in a multiplayer game) enable you to use commercial software in a way that unfairly harms others (such as cheating in a multiplayer game). That's not stealing, but it is wrong in other ways.