The impulse to prove our rightness always backfires.
If your intention is “to show I was right,” what will the outcome be? How will the person you’ve “proven” this to feel as a result? Are they likely to say, “Oh, gosh, yes, I am amazed by your rightness and will never make the mistake of doubting you again”?
If you want to say (or type!) something in order to prove yourself right and someone else wrong, try choosing silence instead.