Oh, everything in moderation. But personally, I don't buy stuff from criminal monopolists.

In some situations, I assume I might buy from criminals -- but I avoid monopolists like the plague.

The problem with monopolists is that they have business reasons to not be compatible. That means they have to keep their systems so complex that they can't easily be cloned -- and also to be a bit incompatible between versions.

That damages my life quality, if I worked with their stuff.

That was a logical argument. After someone damaged my life quality, I will be pissed off. That is human nature.

Edit: The ending was too harsh, I do believe you didn't intend an ad hominem... you just think that it is meaningless to be upset about Microsoft. I hope you're right.