idk if i 100% share all your thoughts on this, but in the most part, yes... cross posting 146% annoys me. I agree with you: it is unfair... I tolerate it and do not want to unfollow my friends cause I actually, love my feed, but... it does annoys me, to see 3, 4, 5 same posts in my feed...
I dont even like too much resteems. tho I agree they are useful and ofc we need them, to raise awareness about the important stuff, to populate good contests etc. but I treat it as unevitable evil, and try not to abuse other folks' feeds with it! but some othre folks are definitely happy to abuse mine...