Of course you benefited from the water. If it was assur b’hana’ah, you wouldn’t be allowed to use it.
For some reason, you seem to think you can say whatever seems right to you, and ignore what the poskim say.
If you drink water for refuah, you are benefiting from the water (even according to your definition of benefit which requires that you want the water to stay), yet the halacha is that you don’t say a bracha. (שו”ע או”ח ר”ד ח’ ומ”ב מ”ב).