One of the more ironic tasks in HiFi is to make the speakers disappear. Quite a feat of magic for big boxes dominating the room.
Yeat, difficult or not, that's exactly what we want to do.
One of the easiest ways to tell if you're system is working correctly is to close your eyes and see if you can point to the playing speakers. You shouldn't be able to pinpoint the source of sound.
Getting this right can often be challenging, especially when you don't use much toe in (as I often recommend).
The fixes for non-disappearing speakers are often a mix of room treatment, proper electronics, and setup.
I would always start in the reverse order from which I just listed. Setup can often make invisible the speakers right in front of you.
If it takes a change of cables or equipment because of harshness or colorations that focus attention on the source of sound, that becomes a more difficult task.
Whatever the case, working towards achieving vanishing sound certainly has its rewards.