Assuming they don't get a revenue cut, pushing back on Microsoft can in principle be effective here.
Microsoft decides what happens here, and presumably today they just take it on trust that hardware makers know what software to install. New driver? Sure. McSpam installer? OK. Maybe they have a guideline saying "Don't ship unrelated garbage" but today it's not enforced because why would you do that?
If the Microsoft customers (particularly larger corporate customers) tell Microsoft they hate this that policy will get tightened or if there isn't a policy one is introduced, and outfits like LG get told if you do this again we're taking away your update privileges, 'cos our customers hated this. Because (as I said assuming MS don't get a taste) this is all downside for Microsoft.
Pushing back on LG will be less likely to work because you already bought their product, so at most you can insist you'll forgo LG next iteration and they know such pledges evaporate in practice usually. Whereas Microsoft has contract negotiations every day, somewhere a $$$ contract is being renegotiated next week and if "Yeah, these LG popups suck" comes up - even if it's not a corporate system but the VP's niece's video editing suite for her vlog that's strictly unrelated - that Microsoft sales droid reports this was an impediment and it's on the list of things that don't benefit Microsoft.
Ah, the usual take. Want to sign everything before it can run, but take responsibility for nothing. And when in doubt, well, the computer did it.
When do we start calling out this crap?
Honestly yeah
MS should get all the flack (which is mostly deserved) of this
Manufacturer does whatever crap they want with "it works" and then MS gets the complaints
A driver should only be that. A driver
The issue is that most corps disable Windows Update and only allow whatever goes through the on-prem Windows Update thingy. This can, of course, fire back if they don't think to include all the updates. We had one such issue where they didn't provide an up-to-date Intel driver for the Wi-Fi cards, and the version we had was a bit broken...
But the point is that companies will probably not complain about this because they'll most likely not see it. Also, they're used to Windows being generally crappy.