Credits to ClassierPompano for the solution.
I've just created a world for this achievement and you can find a link below.
All you need to do is...
Download the file from the link below.
To Import the World
1. From Main Menu --> Tools --> Scenario Editor. Once it's opened, click "File" (on the Top Left corner) then select "Load Scenario". (Click "NO" for saving the currently opened world because it's just a blank world, so click "no")
2. Now, Click "Open Saved Games" to open the folder that contains save files. Then Copy the downloaded file from the downloads folder to this(Folder that opened through AOE3) location.
3. Then close the File Explorer and back out from the Load Scenario to refresh that page. Open "Load Scenario" again and you can see the downloaded file appears on the list.
4. Now, you can open through "Scenario Editor" or from Main Menu too.
5. If you opened through the scenario editor, click scenario on the top bar, then select playtest scenario, make sure it selected as Player 1.
6. Select fire ship and attack(Ram) on the enemy's ship(Cool, they won't attack us back!), our ship will be destroyed once you've attacked the opponent's ship. so use one by one for better and quick progress.
I've placed 60+ ships each, so you need to restart once all ships are gone and You need to restart once again for the remaining progression. Once you destroyed 100 ships, the achievement will pop!
Save File: https://drive.google.com/drive/folders/1FXZmB5Kk9Ogy2gLxqF8p...
You Can also find 2 other achievements save files inside the link.
Following Achievements are