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Your case is borderline and I could see how someone could either punish or pardon.
If you want to avoid this kind of thing, my suggestion would be:
a) If you have something to say, say it at once, do not say 3 words, hit enter, say 3 more, hit enter, say 3 more hit enter. One of your opponents even labeled this as spam at one point. I wouldn't call it spam, but I could see how it would be annoying to the rest of the players. Don't enter the text until your done saying what you need to say.
b) If someone is doing poorly in a lane and you say something offensive, many trib will punish for it. If your top/bot lane is doing really bad, offer advice or assist the situation, but do not ever try to 'call them out' or harass them by referring to them negatively to the other team.
In all honesty, if this is the worst you've done, I think it's a pretty easy fix on your part.