That’s fair, but you’ll get more resources to spend the more you play. I recommend using it the way you would swing the sword as Link. It’s not as good as a long-term summon, but really good as an instant single use attack. On most enemies, one hit will stun them and you can just follow up by spamming the Buzz Blob on top of it. They will drown instantly in the water, but it will also increase the damage radius by a lot. Just remember to keep spamming him over and over.
I don’t think it chains. But in the water, it will stun and damage in a large radius around it. It’s still pretty effective for multiple enemies in general. You can focus on one while others are stunned.