What decisions does it make that you disagree with?
I have a couple of examples in addition to the recent post about poor merging into traffic at on ramp.
These relate to UK roads but after 15 years driving in the US I can't see why they could not apply there in some circumstances.
A few weeks back I was on a main dual carriageway (freeway with two lanes in each direction and central divide) with very light traffic and clear conditions. A delivery truck was unloading goods - parked facing oncoming traffic in my lane. As there was so little traffic, I did not intervene until the last moment, but the car made no attempt whatsoever to slow or avoid the truck.
Another time I was on a similar road that I drive often, clear nighttime on a newly refurbished stretch with very clear markings. My off-ramp was about 1/4 mile ahead as I was passing a clearly marked pull-off / lay-by. Suddenly the car applied the turn signal (a little early for the exit I thought) and promptly tried to merge onto the lay-by (which luckily was unoccupied!)
Of course there's the usual range of sudden and unexpected speed changes, most down to poor map data or road layout, but 2 or 3 quite dramatic hard brake applications passing under large signs and exiting tunnels.
Lowest on my list because they are not really a problem as long as you know where you are going are the merge lane instructions. They often pop up at completely irrelevant times and give incorrect guidance. Least significant are the 'move into faster lane' messages when any sensible drive could see that it wouldn't make sense and likely confusing / dangerous for other cars. The 'merge to continue on your route' is more of a problem if you are on unfamiliar routes and several times has had me specifically move out of the lane I needed to be in.
Finally, 'move out of passing lane' has on several occasions had me move into the wrong lane for my route and have to cut back into heavy traffic.
None of that feels like a fantastic driver aid, but it certainly keeps you attentive!