Asalamu Alaykum i think it's a conglomerate of things all you brothers have mentioned but i think the single thing it leads back to is the state of our nafs. I believe this is the cause because it starts with us and the state of ourselves. Most of the muslims have been programmed as kids up until now through the use of Shaytaans empire he crafted over centuries to live a life gratifying thier Lower Nafs and neglecting their higher ones. The Muslims at least the majority largely in the west are "cattle" we eat, sleep, watch p, do haram to "have fun" and we don't care. Some of us alhamdulillah are fighting against this but I think until the majority of the Muslim nation starts actively fighting against thier nafs that want even just halal pleasure we will not grow in iman and we will not taste it's sweetness as we're to busy in a state of pleasure to feel the state of peace. The more we fight our own demons, embrace the deen more and more in our lives and improve upon it and evolve as men in this dunya by improving our physical, Mental and Fiscal ability by the will of allah we will all remain stagnant. I'd say honestly the biggest solution is of course Islam i'm not taking it away it's the backbone of everything but especially the pursuit of what we call "Islamic Self Improvement" as men in our lives on a large scale can have wonderful consequences. May allah make this community a beacon for this process to flourish and to pull young men out of the whole they dug themselves in thier nafs and move towards the haqq and towards iman ameen