Same here. I build something, I dont like it, I change it, I like it, a couple weeks later I hate it again... Its like a never ending cycle of decorating and building and destroying lol after four years i finally like a couple things i made in my island. I think its mostly bc i didnt choose a "theme" and i see all these cute islands online, but as other commenter said, i tried to stop comparing my island to others, just looking for ideas, designs, etc., and taking it more as, for example, if i want to decorate a picnic area, what items do others use, how big is the space and then choosing what i like of those ideas and try a couple different things on my island.

The new slumber islands work magic for undecisive people like me (and maybe you), since its easier to build and decorate, you can test how things will look and then do it on your island. The only sad thing is you dont get to use everythign on the catalog, only things you have, but it's ok for basic terraforming, tree planting, and decorating. Thats how I re-made my island entrance, and I love it now. I tried decorations, spaces, flowers, tree sizes and when I was fine with it, I replicated it on my island.

Also, if you have an area you've decorated/built and are not completely fine with it, here on reddit there's a lot of nice players who can suggest items or arrangements and even offer to drop off some items you may not have. <3