I’ve never liked grey decor and when it was on trend I couldn’t find anything I liked as everything was bloody grey!
We were moving house and one property had every room decorated in shades of grey. My DD called it the “House of Sadness” as the grey everywhere was so dismal 😂😂
I think OP if you’d posted this a while back when full-on grey was more popular, you’d have gotten more mixed views.
I don’t like grey (or marble) so it’s utterly pointless me giving my opinion as our styles are so different. You’d hate my style - it’s very rustic!
The point is, everyone is different and even if everyone else hates your style it doesn’t matter. Your house is for you.
The carpet looks warm and cosy. The chairs are very comfy (I’ve sat in very similar!) The table is perfect for Lego (very flat with no bumps like a more rustic table would have). Practically they’re excellent choices so don’t feel bad.
There are loads of low cost ideas in here to make it a bit less grey. I think that’s all you need to completely change the feel of the room.
Ideas I liked: table runner, colourful table centre piece, big plant, place mats, maybe a rug to break up the grey? Colourful chair cushions?
If you’re feeling adventurous a PP suggestion to rub down and change the colour of the legs is great,
Don’t despair. Think of this as a starting point, a base upon which you can build a beautiful room with some well-chosen non-grey, coloured additions. I bet it will look completely different when you’re finished.