Ah… well, I was going to say you could add a passive preamp to the setup (basically just an analog volume control with smooth movement that doesn’t move in notches) but it wouldn’t make sense here since these are just plastic toy speakers. The preamp would cost more than what the speakers did. It would be better to return them and get something better, that doesn’t have major usability flaws.
If you can’t do that, I’d recommend just setting them to some middle volume level and using Windows to control your volume.
Unbalanced passive attenuators are readily available. Nobsound | Solupeak | another Solupeak | Schiit SYS
Nobsound passive volume with rca in/out. I currently use it to control volume for powered speakers with the volume knob annoyingly on the back of the unit.
Nobsound High Precision Passive Preamp Volume Controller VOL Control HiFi Preamplifier ALPS (RCA&HiFi Version, Black) https://www.amazon.com/dp/B07GRLV7XG/ref=cm_sw_r_cp_api_glt_fabc_89VRF6FN6PBW43SG4G1H?_encoding=UTF8&psc=1
Mackie big knob - I use the passive rca version.
Mackie Big Knob Series, Passive 2x2 Studio Monitor Controller (BIG KNOB PASSIVE) https://www.amazon.com/dp/B01NCUZ32O/ref=cm_sw_r_cp_api_glt_fabc_CHK4P2R77BMKARSF02SH
Schiit SYS - another good option. Might have to order directly tho.
Schiit SYS Volume Control and 2-Input Switch https://www.amazon.com/dp/B00K6Q2A4C/ref=cm_sw_r_cp_api_glt_fabc_2JSBF0NBKACPS1PHXMSM?_encoding=UTF8&psc=1