Hey! So I am currently working on this island, but, when I zoom out, everything looks messy, when I go closer, it looks good.
The gif below is an example
I would go to edit. Click on sea level, select all the water you have already put in place. Then click on evaporate and then click on generate. This should remove the inconsistencies and fix your issue.
Making water sucks because of this issue. I downloaded this plugin called Part To Terrain. Make a part. Scale it how you want. Open the plugin, press the water option, and touch the part. It creates smooth terrain. Part to Terrain - Roblox
There is no problem. It just looks like that from far away. From the player’s perspective it will be normal and the physical terrain has no problem. It just looks like it. All will be fine for the player.