And now your saying to do nothing but shrug and wait.

That's what I've said the entire time. That sentence does not mean "the risk becomes real only if we are fools who do nothing." It means "the risk is real even when the appropriate course of action is to do nothing." It is not a distinction.

People insisting that Steam is a monopoly are implicitly arguing action should be taken about it.

No.

it doesn’t matter what word you use

It does because basically any other example would be a problem that needs solving. Even now, it has far-reaching effects, some of them dire, and we tolerate them because any direct solution would be worse. Those problems are still real. The label is still accurate and necessary.

Stop saying it's not a monopoly just because we tolerate it.

I don’t disagree with you

Demonstrably false. If you think saying it's a monopoly requires action, that is the central disagreement.

And will you be just as upset in a year from now when your failure to say anything of substance has again caused me to not remember you?

If you're still telling people an obvious monopoly is not a monopoly if the monopoly is kind of okay, yes, I will still explain why that's the exact same mistake. Internalize the definitions you claim to acknowledge. Stop saying it's not a monopoly just because we tolerate it. You cannot agree that it meets the definition and still argue about the words used. That's denying it meets the definition.