You should use chat and say nice things to your teammates, "wp", "gj team" and things like that will help !
"pretty much" does that means sometimes you get a little bit frustrated and say something ? even if it doesn't seems bad to you sometimes people don't get that what they say can be labeled as toxic, spamming pings, things like that too.
What i mean is that even if you pretty much don't use chat anymore, a small "stop feeding", being passive/agressive and so on can stop your progress in honor if you're being reported for it.
There must be something you do and you get reported for to stay honor 0 like that, i don't know what it is but it's impossible to stay half a year honor 0 if you have a perfect behavior, you get honored and so on, unless you're not playing a lot of game over the course of that period.