Triste, word by word:
This [is] simply something.
"Simply" here means "just", and "something" is used as here:
4. (colloquial, often with really or quite) Somebody or something who is superlative in some way.
He's really something! I've never heard such a great voice.
She's quite something. I can't believe she would do such a mean thing.
Periods after each word mean: the speaker so overwhelmed/surprised that she/he stops after every word.