How do I help new players that just insult me?

Meditation can be nice early game.
Issue is, you can't sell actives ones purchased.
Since you can only equip 2, they are usually spend better on other things.
However, the opinions on meditation are divided.
And it also depends on the game mode.
For example; in Assault, pretty much everyone grabs it for the heal from what i've seen.
But in Arena, I barely ever see it used.
Since the base is close, you can just run back for a few seconds, and come back with full mana and hp.
As for conquest, I honestly have no clue since I don't play that.
But pretty much everyone else here does.

As for helping people, I usually send them a whisper instead of using the public chat.
Just seems to be a better idea.
But a lot of times, despite my best efforts, people neglect it and either rage at me or ignore me.

There are people that do take advice though.
Example:
I played 2 rounds with the same Poseidon in arena yesterday.
The first time I noticed he did not use Gem of Isolation
When I encountered him on a second game as my team-mate, I whispered him, I suggested for him to pick it up because of the slow, and makes his whirlpool almost inescapable without actives (most jumps are blocked too)
He took the advice, and thanked me for the "great tip" and "That it does indeed help a ton!"
It got him to land his Ulti a few times dead-center (Inner part of Poseidons ulti does more dmg)

So there are some that take advice, but from experience, the majority simply does not.
And I always make sure my tone is helpful and nice, and not like a jackass that goes "omg u suxx0r u ned THIS ITEM! cause I say so!!!"
I give them a reason as to why it would be helpful.
It just gets discouraging when you do bother to type out an entire explanation and you just blatantly get told off.
But I keep trying =)

Super cool advice here. I can see why meditation wouldn't rock later on. And I didn't know you couldn't sell it. I also didn't know about Gem of Isolation. That's could be SUUUUPER useful for some builds i'm working on.
Good that you are being nice and helpful. Seems kind of odd that so many would still be jerks. But then this style of game tends to foster it IMO. I'm actually pretty impressed with reactions on these forums so far. No hostility at ALL to my newb questions and awkward newb stories!