Am I the d!ck here? I might well be.
There's a stretch of road I often use, basically two lanes that eventually (the 2 lane portion is a few km long) become one - the left hand merges into the right.
Now I'm a chilled driver, I'm cruising along in the left lane, folk are passing me, all good. Until we get to the point where we need to merge. Now that right lane is backed up and the left is normally much shorter so what happens is I get close to the front and then folk do that whole you go then I go zipper type merge. But some folk thing I'm cutting in. I mean there's time I'm literally the only car in that left lane and there's maybe 10 in the right - should I have pulled into the right lane and joined the queue? Because I've done that as well and then other cars cruise by in the left and I'm like well, they're not doing anything wrong. And I get there's a difference between being technically breaking the rules wrong and common courtesy on the road but I don't even see this as being uncourteous (yes I know that aint a word). Is it an unwritten rule that you should always stay behind the car that was ahead of you?
Late to the party here but you're not the dick.
If the left lane merges into the right and there's traffic on the right then you keep left and join at the end via ye olde zipper method.
It eases congestion and tailbacks by filling the 'unused' lane. People who are salty because they think you're cutting in are the ones who need to go back to driving school.
Far too often in those circumstances you see idiots trying to squeeze in from the left lane far too early and way before the end of the lane instead of heading to the end along with everyone else who needs to merge, and following the zipper.
So you have one long empty lane with a long tailback created by idiots who don't know what they should be doing, and multiple cars cutting in wherever they can find an opening instead of being fairly and evenly managed at the joining point.
Bad drivers get angry because they're the weakest link on the roads and don't understand the rules.
Don't listen to them. Know the rules and follow them. Driving is a wonderfully ordered system. Don't be an agent of chaos.
The Brits largely suffer the same problems.
Went to London this past week. Four near misses during the drive there because idiots don't look before they merge, don't use their indicators, and don't know which lane to exit into from a roundabout/interchange.
Having a licence doesn't necessarily mean someone knows how to use it.
The responses to your post saying you did anything wrong should speak volumes.