Exactly. It’s plenty useful for Network-Attached-Storage. That’s what it’s built for.
Your network needs are a bit over the top, but maybe consider the Minisforum MS-01. Small form factor, i5 or i9, up to 96G. RAM, and 2x SFP, and some low profile PCIE space if needed in the future. This is WAY more than you need for your service needs, and you can just expand your Synology disks for extra storage super easily. Saves money, and solves your problems without needing a full rack-sized server.