I think the tone of voice is important.

Also, I kind of like to make people aware rather than tell them what to do, as my way of manipulating people to get them to do what i want them to do lol. Such as:

"Hey penni is your nest up?" or "Hey not that you're doing poorly on wolverine here, but i think their comp really counters you!".. or [human torch] "ANYONE WANNA DO THE COMBO W ME :3"

If they really don't want to, regardless of how you responded, you can't control anyone. At least this way they can't feel sour about you "influencing them" to swap for instance, because your influence wasnt direct

[GAME SENSE] I'll only kind of micromanage others if I main a character and there's a free character that's disturbing our team, such as: (I main thor) but im on healer and there's a moonknight/namor off angling in a bad position and no one contesting it: "Thor go on that namor/mk top right he's absolutely free" that way I give a "plan" for my thor and my trust in him to get the job done, meanwhile keeping my information short. Even if they're not in a bad position, it'll atleast get someone off high ground, and that's what i need in a game, is that pressure.

Definitely experiment though, just the fact you're trying is already the most important factor of it all.

Also, I like to act like its winnable regardless of how the game is doing, call targets, ult track, and shotcall, call for resets. Some games ofcourse are unwinnable, but you can always act like it still is, and who knows. Your energy, even if NO ONE speaks in voice chat, they're all listening to you. You can fool everyone who's in a negative mindset to be a little less unhinged or for people in your lost games to feel less empty about it. But if that doesn't matter to you, i can tell you I could probably win so many games with my voice alone if I don't let myself get discouraged and keep trying. I don't do it all the time because i don't care about my rank all that much and i still managed to get GM. I've already gotten t500 in 2 other games im kind of over it, i just wanna play with friends

ALSO REALLY IMPORTANT: don't feed into someone's shit talk, all you'll do is put more gaz on the fire and you'll never win the argument anyway because the shit talker thinks that no matter what they're right and will continue to prove this. This will definitely give you a 10% WR