I'm with you. I bought a Homepod and thought I would make use of Siri for timers, to-do items, grocery lists, and other similar tasks in addition to music. However, Siri is so comically useless for music that I don't even bother. It's significantly faster to just pull the song/album up on my phone and tell it to play on the Homepod.
The only things I use Siri for now is to add ONE item to the grocery or set a timer. The timers are useful in the kitchen, but it's hardly worth a Homepad to set a timer.
I wish I had returned it within the return window. At least it sounds great.