Why is it "Allah let\[ting\] us be alone" when this is clearly what people are deciding to do? Allah ordered us to get married unequivocally in the Qur'an and then we as a community chose not do it, then wonder whether Allah will let us reap the consequences of our own actions
ظَهَرَ الفَسادُ فِي البَرِّ وَالبَحرِ بِما كَسَبَت أَيدِي النّاسِ لِيُذيقَهُم بَعضَ الَّذي عَمِلوا لَعَلَّهُم يَرجِعونَ
Corruption has appeared in land and sea because of the doings of the people’s hands, that He may make them taste something of what they have done, so that they may come back.
ما أَصابَكَ مِن حَسَنَةٍ فَمِنَ اللَّهِ ۖ وَما أَصابَكَ مِن سَيِّئَةٍ فَمِن نَفسِكَ ۚ وَأَرسَلناكَ لِلنّاسِ رَسولًا ۚ وَكَفىٰ بِاللَّهِ شَهيدًا
Whatever good befalls you is from Allah; and whatever ill befalls you is from yourself. We sent you as an apostle to mankind, and Allah suffices as a witness.
This is called Jabr (Fatalism). Allah gave us free will and we are choosing our own self-destruction by being highly unrealistic about marriage.