General Question: Is it ok to trash talk a little if it helps you win?

So basically the title, i've seen this talked about too in the league episodes of 101 some people saying they do it to win.

Long story short, I was smurfing playing Dr.Mundo and I'm not usually a toxic player anymore on my main. However I do know how big trash talking effects game in lower elo

For ex: Trash talk in Diamond you'll get muted and reported, Trash talk in Gold - Silver - Bronze , people will afk, intentionally feed, focus you and just rage hard

I played a game as Mundo where I antagonized the other team but asking them why they kept camping top and all that stuff, the last fight of the game

every single one of them ulted me, VI ulted me, Viktor ulted me Gnar single man ulted me and they basically all just focused me, TWO of them ignited me. I ended up dying but not after we aced them because our Twitch adc got a pentakill and nobody else on my team died because they wasted everything on me.

I've used this strat a couple times as Mundo, there's even a "toxic mundo" skin to look cool with it. He's a perfect champ to do it with

Only problem is, i've been reported a lot because of it, I still say GG at the end and give advice like "don't let emotion take over" post game. they report me and i get warnings but it's pretty much freelo.

Is this against the rules or not? Anyone can answer my question pls?