Items serving a "purpose" and how to fix the adc-in-2k17-probleme
When riot reworked the ap and ad items in the last 1-2 years they followed the idea: Every Item should be unique and serve a certain purpose. It might sound great but it sucks.
A damage carry needs ALL the stats:
For ap carrys you can buy as 2nd item (assuming morellos first):
-> +Magic pen / but lacks raw ap and defensive stats
-> +defensive stats / but you 70 ap and no pen... it doesnt do dmg at all
-> + a lot of raw ap / but everything else missing, and its to expensive
Of course once you're fullbuild everything works out but before that... (back when i began with league there were 3 120ap items and no matter what choice you'd have an amazing 2 item powerspike)
But as midlaner is shouldnt complain because riot still hasnt removed the 
wich is infact a multi-purpose item.
Adc need: AD, AS, Critchance, Lifesteal, Amorpen
And you need at least 4 items to get ALL of these stats. And as an Adc you need ALL the stats to do any shit.
In season 6 people fixed the probleme with 
on 
or 
(but it was nerfed)
Meanwhile it has become popular to buy 
, because its ACTUALLY BETTER THAN BUYING COMPLETE ITEMS.
RIOT FIX YOUR ITEMS!!!!. THEY SUCK!
ziggs botlane is only op because everything else has becomen so terrible
(and this development should not be appreciated)
and when there are items, that serve multi purpose, giving a little of all the needed stats, so that an adc can have a something like a 1 or 2 Item-powerspike, adc will be fun again
I know this is a lot of text and im actually very salty, but have a nice day and a lot of fun playing adc -Glory97
