So telling someone what to build for the situation is consider Toxic too?

If they ask you for advice what to build, then no, its not toxic. But if they dont ask you for opinion or advice, then yes its toxic.

sometimes it's not what you say, but how you say it.

Toxicity is often more about how you say something than what you say.

"hey idiot, they are all AD, why do you have MR?" vs "it might be better if you did blablabla"

"OMG get armor you fucking noob cancer" != "As i was looking for the scores something caught my attention. I saw you were lacking of resistance against the high physical damages our ennemies happen to have. For this reason i suggest you to proceed to buy some armor for the game isn't over yet and we shall do anything to win."

(Not sure my english was good though ...)

i feel it, people can disagree with me but i've had games against full ad teams or games where there were 4 ap and an adc and everyone was doing horribly except the adc who was fed af and everyone in my team who was tank/bruiser kept building mr and im just like "hey the adc is fed you should probably build armor since the rest arent doing much damage" and someone said stfu, surrender voted and when it failed 2 people afk'd :l

Suggest.

Like everything else in the game, there are several right ways and wrong ways to do so. Generally, the distinction is between suggesting and ordering.

Example of a right way: "If you get a hexdrinker first, you'll dominate the lane" Example of a wrong way: "Idiot, you have to rush hexdrinker or you'll feed like a noob"

Imo, if they cannot handle "I think you should build item x" with nothing else said, then they should reevaluate their perspective on negative behavior. On the flip side, it is not your job to make other players better, it is matchmaking's job to match them lower after the game, so try not to be bothered by bad builds

Telling people how to play is toxic 98% of the time. If the guy builds cookie cutter builds that are dumb, you aren't going to be able to explain the item system to him. Let him rush IE into Ashe bot, who cares it's his life? You will be the dude with the QSS early, be that dude.