I can excuse Jon charging in alone and putting everyone he has ever been with at risk (despite that not being in character at all) because he is mad, but the way it was down was so stupid.
You're an incredible idiot, it seems like you have 0 life experience and think people are rational at all times. It's as if rational thinking doesn't go on 'off-mode' in such a desperate moment. There was nothing 'stupid' about it, it made perfect sense.
Arya arrives in winterfell and no one even tells her Rickon is dead. She also never mentions him or cares. “We are the last of the Starks, wait a minute guys, what happened to Rickon?”
WHAT? This was literally said to Arya in S07E04, albeit implicit. Like watch the fucking episode you dumb idiot, specifically the crypts scene.
The only reason rickon dies there is because the plot needed him out of the way because they literally didn’t even remember rickon existed for most of the show and didn’t know what to do with him.
Rickon dying made sense in every possible way, it was foreshadowed as well. The kid was under a traitors arms, and came in the hands of a psychyopath. The fact that you don't pay attention doesn't mean the writing is bad. The reason why he dies is because he got screwed over. Rickon had 0 influence on the plot before his dead, so again, a complete nonsensical point.
You fire an arrow at a location - after you fire it you can not change the location it is going to travel to. Arrows are not bullets they arc more dramatically arc and travel slow enough that people can literally catch them.
To avoid an arrow shot at a hundred yards - you see the arrow being fired and then you move. That’s it. It doesn’t matter how good a shot Ramsay is, he can’t change the path of his arrow after he fires it.
Again, Rickon is a dumb kid that didn't have strategy in the moment. He wanted to get as fast to his brother as possible, as a 11 year old kid would do. Also it isn't that easy to see how the arrow is traveling due to it's small size and the fact that there is sun-reflected sky to make it even harder to see how it travels when looking up.