Your comment can be read in multiple ways

“It’s called pinterest. Go there instead. This site is not for you.”

or

“It’s called pinterest. This thing you are interested in already kind of exists. Just thought I would let you know.”

The people downvoting had the first interpretation, I assume.

Honestly reddit’s (and Lemmy’s) comment formatting structure is so much better than other forums that it’s been part of the reason why I don’t want to use the other ones.