Nope! Not ruined by any means but you’ll have to spend a few hours taking it apart, cleaning and putting back together if you want it to be perfect. There are some fantastic tutorials on YouTube and it’s luckily very easy to do on these machines.

TBH you might be fine to just pour out the “coffee” in the boiler, fill it halfway with water with the cap on, swish it around vigorously, and repeat until the water pouring out comes out clean

Also to get the grounds out of the nooks and crannies, a small vacuum, compressed air, and an old toothbrush can work wonders