I'm just against people assuming that if they put their blinker on then others should accommodate them. That'd be silly driving. Finding a proper gap and putting on your blinker to indicate you're moving into that gap vs. deciding that you want to merge right now and others should make room

That kind of cooperation is mandatory for good traffic flow and properly made laws try to ensure that. Turning signal should result in people noticing you, and letting you safely switch lanes. Too often people get into some vigilante-mode because they see the other driver skipping in line or something similar.

Merging is another story. Merging traffic should explicitly yield to all traffic already on the highway, similarly to how it works in a roundabout. This prevents people merging on a highway that's over its capacity, so the traffic clears quicker. It means that traffic should queue on the ramp until it's safe to merge, indefinitely if necessary. Mathematically it makes sense, but goes against intuition.

Some municipalities have tried out metered entry on highways, that block turning onto the on-ramp altogether if the level of congestion is too high. Some trials have already ended due to the perceived injustice as well, as people already on the highway are typically from out of the city, and thus preventing those living closer from merging onto it. Personally I think if you're close enough to complain about that you should be in public transit range of the population center, and complaining more about the lack of alternatives to driving.

Your post did it this decade.

Don't act on your assumptions as though they're reality. You'll always be wrong and appear insane.

my wife has at times accused me of driving like an old man. and... my nickname has been grandpa since i was in my 20s and maybe that's because i had some really cool grandpas. but like, i swear karma exists on the roads out here. if i make room for you, there will be room for me. it's called karma.