Is iPhone X waterproof?

No. The iPhone is not waterproof, nor is it advertised as such. It has a degree of Water Resistance. Which means it can take some light splashing and humidity, but is not rated, for submerging, swimming, or high velocity water contact or extended exposure to water such as a strong rain, or a shower.

Water Damage caused by any of these will not be covered.

You can read here for details about the iPhone's water resistance: About splash, water, and dust resistance of iPhone 7 and later - Apple Support

And this photo shows the phone getting splashed, not submerged. If you took the time to read about the phone you purchased, you would have seen iPhone X is water resistant, NOT waterproof. Sorry, but if your phone shows signs of moisture inside, the warranty does not cover that. And iPhone warranty specifically says this.

That may be your conclusion. For those of us who can actually read, and take the time to do so, that is not the logical conclusion.

Go ahead and call a lawyer if you want. It won't help much other than to make your wallet lighter.

Not very likely. All any attorney will likely do is read the warranty and tell you exactly what we've been trying to tell you and that is the phone is water resistant, not waterproof as is specified in the warranty you could have read from the beginning.

What should make you sad is you didn't properly care for your phone. Apple is treating you exactly as their written warranty suggests they will. You really don't have any reason to be upset with Apple. You should be upset with yourself for not properly caring for you expensive iPhone.

No. Apple does NOT advertise it as waterproof. It is water resistant. There is a difference.

Liquid damage is not covered by the warranty.

You're not talking to Apple... This is a user forum.

Thanks for sharing... but I think I'll hold on to my Apple stock anyway.