The right lane is for slower-moving traffic, not a free lane to be used only for merging and unmerging.
They spend a lot of money building special lanes for merging and getting off; they are called the merge lanes and the decelleration lanes. That is where people should accelerate and decellerate.
I dislike drivers who drive down the acceleration lane at 40mph, and then when you drop back and accelerate to get on the road, they cut into the right lane just as you are trying to merge at speed (although in honesty, if I’m accelerating faster than the car in front of me, it’s because I’m going to move over 2 lanes, because it would be discourteous to cut off someone in the acceleration lane who had to pull onto the highway at some point).
When using the acceleration lane, I tend to simply drop back early, to leave me enough space to accelerate to speed regardless of what the guy in front of me does.
I also dislike people who drive past people stuck in the deceleration lanes, and then stop in the right lane right at the final exit point with their blinker on expecting someone to let them in who has been waiting their turn to get off a road (this applies when there is a backup on the exit ramps).