It is true that SSSI and SNRI antidepressant and tricyclic antidepressant (TCA) drugs are associated with a high incidence of permanent physical sexual dysfunction, and also emotional blunting.
But there are safer alternatives such as moclobemide, an effective antidepressant that boosts dopamine levels via an MAOI mechanism.
This paper looks at the rates of sexual dysfunction reported in different antidepressants:
Table 1 shows SSRIs and SNRIs are often associated with sexual dysfunction, with rates of sexual dysfunction up to 70%.
By comparison, TCAs have 30% rate of sexual dysfunction.
And MAOIs 40%.
But moclobemide which is an MAOI had a low rate of sexual dysfunction of just 3.9%.
But few doctors will prescribe moclobemide (and it is not even licensed in the US).
The paper in the original post doesn't state which antidepressants were prescribed, but I assume it was mostly SSRIs/SNRIs since they are to my knowledge still the first-line antidepressants. You are right there are alternative ADs such as MAOIs and Bupropion that don't cause sexual dysfunction but then again have problems of their own. In Germany, St. John's Wort is used widely as first-line treatment for mild to moderate depression and the side effect profile is perhaps better than most man-made chemicals.
Personally even a combination of maximum-dose Escitalopram, Olanzapine and Accutane (not a psych drug but pretty harsh med regardless), which I was on for several months (years ago), wasn't able to kill my libido. Then again I'm a bit odd case in regard to response to different drugs. Had I taken the same drugs during adolescence with a still developing brain, perhaps the situation would have been different though.
I would not jump to the conclusion that lockdowns caused depression in young people, especially these days when kids and adolescents mainly interact through social media anyway, and lockdown did not stop that interaction.
When people see a new phenomenon, such as this sharp increase in depression in the young, they usually assume the simplest or easiest-to-understand explanation, in this case lockdowns. But we live in a complex network of cause and effect, and the easiest-to-understand possibility is not always right.
We should consider the adverse neurological effects that the SARS-CoV-2 virus may have on the brain and central nervous system. We know SARS-CoV-2 can frequently cause the neurological illness of myalgic encephalomyelitis / chronic fatigue syndrome; and studies have shown SARS-CoV-2 can also cause psychiatric illnesses such as depression and anxiety in children and adolescents:
Prevalence of mental health problems among children with long COVID: A systematic review and meta-analysis 2023.
The interaction through social media doesn't really equal to true human interaction though, and like Daniel Cooper mentioned can sometimes be counterproductive. I saw a video of woman paralyzed after taking covid vaccine on social media once - imagine adolescents sharing these type of videos (whether they're factually true or not) with each other, well the fearmongering (towards to both the COVID and the vaccines) has easy tendency to get through doesn't it.
Good point, I don't know anything about virology, you seem better educated in that regard. So perhaps the COVID has direct effect on this depression/anxiety symptomatology too, but I wouldn't say it's all-explanatory either.