Your comment was fine. We're grateful to everyone who participates here even though English isn't their first language. HN is a highly international forum.
The account calling you out for poor grammar is only three hours old.
Please don't take that as some reasonable representative of general HN culture or sentiment.
I would just like to say welcome to HN.
what happened to you is exactly what no one here should do.
Please end your sentences with periods. It's basic grammar. Alternatively, relax a little.