Feeling ungrateful and I Can’t Help Myself via /r/gratitude

I am ungrateful and cannot seem to shake myself out of it. I know it's wrong but I can't stop. It's ruining my mental health, and I need guidance.

A lot of this ungratefulness comes from material wants/desires. I am 27, who currently works a pretty demanding job. I work some long hours, and my wife stays home with our toddler. We rent a small 2bed 1bath house and have two cars.

I am ungrateful for all of that stuff. I continue to think how we should OWN our house, but can't save up. I WANT nicer cars that don't have dents from car accidents and we couldn't afford to fix them. I'm WANT a bigger house, so my wife and kids have a larger play/resting space.

As I type this out, it sounds so ridiculous and really narcissistic. It definitely is…but I just can't seem to stop these negative, ungrateful thoughts. I should be grateful for everything I have in my life, but my mind keeps thinking so negatively about these things.

Any help or solutions would be very much appreciated.