"'Kill Steal' Thoughts" from a Support Main/Secondary ADC
If you had woke up today, and everyone around you had no legs and you asked them, "Why do you have no legs? What happened to them?" and they said, "We look better without them." Would you remove your legs and the ability to walk, so that you could fit in?
If your support takes a few kills, by accident or zeal. do not belittle them or continually make comments about it. don't even let it get to you. you are better off having them by your side than not. And your negative, selfish "kill steal" comment could dramatically impact their game play negatively whether consciously or unconsciously. Think of it as "Kill Secure" not "Kill Steal". Do not remove (verbally abuse) your legs (your support) and the ability to walk(ability to win), so that you can fit in (get a good personal grade).
As a support main and secondary main ADC, most of the time when I "KS", as support it is purely unintentional, and having played next to some really good adc's and some adc's who were testing the waters woefully, trust me when I say, It's more your fault as the adc that you didn't get the kill, than it is your supports that he/she got the kill.
and
actually both deal quite a bit of damage sometimes. The slight changes to Leona after using her ultimate makes it so she deals more damage with auto attacks.
Literally blows if he is ks'ed 6 times on purpose.