I don't want to waste your time; I don't want to waste my time. I'm extremely hard working, goal oriented in an atmosphere/environment where I enjoy myself. I'm willing to help whoever needs it so long as they put in the time and effort needed to achieve a goal that mutually benefits us both.
However, when I see that my ADC who called that role doesn't know how to last hit even when under no pressure from the enemy laner(s) while I'm their Sup and doing my thing, that tells me they didn't put any effort into understanding the basics of the games. I've seen that shit from "Gold ELO" players who talk shit about silvers and bronzes. From Gold ELO and onwards, I expect the player to AT LEAST have some understanding of champion power spikes, strengths and weaknesses, CDs, importance of relevant map awareness/vision control, etc. Yet, they don't - their accounts are just ranked as being in Gold ELO.
If I deduced that my team isn't competent enough to win the match up, I should at the very least be able to suggest that we "surrender at 20" to save eachother time and frustration. Until that surrender of course, we try to play the best that we can based on all the information we have available to us, respectively. If at the 20min mark, 4/5 of us agrees to surrender, we should be able to surrender the match. To me, theres nothing wrong informing your allies beforehand that you believe you should surrender at the 20min mark. If they agree with you, good. If not, then you go on playing doing your best even if the initial surrender vote fails. What would be wrong would be to stop trying and afk or rage quit the game. You can play badly (proxy split push all game), but you don't afk or rage quit ever.
Also, informing your allies of what they're doing which you feel can be improved upon isn't wrong either. If they're playing ADC and they're not last hitting (10cs at 10min mark), I HIGHLY RECOMMEND YOU TELL THEM TO LAST HIT THE MINIONS! If you're playing Sup and your ADC isn't shoving while theres a particular power spike you feel you can capitalize on by killing the minions yourself, do it. If the ADC rages over it, then let them. Theres nothing wrong with doing whatever you feel you have to do to win just because you're playing to win. Most ppl who whine with such phrases as "tryhard"... I don't want to even listen to them.
Anyways, pt is, a player should be able to suggest to his team to surrender at 20 if he feels like it.