>the same person with a different psychological education can become suicidal or give zero damn about the same situation

Or even like it. Reminds me of a quote about solitude: "I live on what others die of." (Michelangelo)

There is no evidence this is a new era, rather then just one on which those things are actually talked about.

Gay people existed well before smartphones, you don't think sexuality anxiety might've been a significant issue for people in less tolerant societies?

Not in the same way at all. People knew it was rejected so you live your fake life and hide your desires for when / where you can. Now it's a question whether people should or shouldn't accept you, you spend more time in indecision and worries. People might suffer, but not the same.