You don't get punished for first offenses, unless you use hate speech. If you're getting punished, you are repeatedly getting reported for the same kind of offense. If that's the case, you probably need to not talk to people in your game if you're going to do nothing but say things to them that will be deemed insulting or harassment.
I mean, I saw your other thread, you harassed people in the listed games quite frequently. You weren't reported and punished for simply saying "you suck" or "this team is awful."
You were reported and punished for saying things like:
"dstruck71: fuck this thanks for checking ez
dstruck71: keep sittin there
dstruck71: report ez
dstruck71: fucking troll
dstruck71: im reporting you ez
dstruck71: im bnehind cant help you hug turret
dstruck71: i cant help you garen
dstruck71: just hug your turret and wait for whatever cs you can get
dstruck71: why are you building damage garen
dstruck71: ez never speak
dstruck71: if we lose its mainly you"
and
"dstruck71: why didnt you kill the little shit he didnt have a ward
dstruck71: you where full
dstruck71: go get me dragon
dstruck71: i fucking hate first pick
dstruck71: get drag
dstruck71: i dont need help
dstruck71: fucking dragon
dstruck71: now.
dstruck71: get lost
dstruck71: AWESOME
dstruck71: so many free chances for drag
dstruck71: and they get it
dstruck71: \dont play jungle
dstruck71: get FAR away from my damn lane
dstruck71: stop being a bad jungle
dstruck71: your only job uis draon
dstruck71: i dont need or want help
dstruck71: EVER"
and
"dstruck71: if you dont get dragon im leving
dstruck71: NOW
dstruck71: seriously
dstruck71: FUKCIMG DRAGO FUYCKING
dstruck71: im done i will never leave top
dstruck71: no matter what
dstruck71: i refuse to be your tank
dstruck71: im fucking done with awfu teams
dstruck71: dragon > 1 fucking kill
dstruck71: dragon > all camps
dstruck71: free dragon
dstruck71: yet you dont get
dstruck71: cause you SUCK
dstruck71: sick of getting teams like you
dstruck71: why are you in my fucing lane feeding?
dstruck71: AWESOME you havd like 3 FREE minutes to get drgaon
dstruck71: you just roamed the river
dstruck71: bot lane was pushed no chance for counter
dstruck71: you gave THEM drgaon
dstruck71: dont play jungle ever again"
So no, you won't get punished for just saying "you suck." But if you keep saying "You suck, report you, fuck off, I'm leaving since you didn't get dragon, get lost, don't play jungle again, stop feeding" and the other repeated harassment, you WILL get punished, especially if you do this over and over and over again.