Which (religious) group hasn't faced destruction and humiliation at some point in history? If you want a specific reason why Muslims are weak, it's because they have left the religion for worldly pleasure as has been predicted in the prophetic narrations. The view of jihad is also flawed in the mind of the average Muslim, many think it's about pride(machismo) or being revolutionary or some desperate blood sacrifice when it's about rectification, fighting evil and pleasing the One Lord with true sincerity.
That being said sometimes God decrees destruction that even the most pious won't withstand like the coming of Gog and magog, only the invocation of the son of Mary will destroy them.
If you're interested in the opinion of scholars, I suggest you listen to actual salafi scholars like this one:
https://m.youtube.com/watch?v=TnNW7UO_sBA&pp=ygUTQWwgYWxiYW5pIHBhbGVzdGluZQ%3D%3D
Know that this life will pass like a half of a day with all of it's joy and misery.