my starter fortress keeps sinkig

i do not know why i cheked the ai i have engugth power

https://preview.redd.it/bef5pr5p543e1.png?width=1910&format=png&auto=webp&s=cfea80b88da8131a71aa93fae7633e644080107c

https://preview.redd.it/tdl2uhgr543e1.png?width=1919&format=png&auto=webp&s=8c065d44659fc2df9c80d6d295bfb087f52b484d

https://preview.redd.it/4i7fcz5s543e1.png?width=1918&format=png&auto=webp&s=c0a985a7e013293f6c418ae891a91b2e5e02c34d