Struggling to keep my iman and feeling lost

Salam everyone. I've been going through a rough depressive spell, and for some reason my faith is slipping away. I've been trying to read Quran and seek forgiveness, but I keep missing my Salah and weirdly, I don't even feel guilty about it. When I ask Allah for mercy over things I've done, there's no remorse in my heart, which I know is a bad sign. I believe Allah is real-I wish I wasn't feeling this disconnected. But honestly, a lot of religious stuff just doesn't resonate with me lately. I'm tired of the constant emphasis on modesty and all these cultural expectations (some of them in our society make no sense to me). I find myself wanting a husband and intimacy, and sometimes the rules feel overwhelming. When I open up to my mom about my mental health, she always says it's waswas from shaytan, and that just frustrates me so much. I see the way others live and part of me thinks it looks easier and more enjoyable. I remember times when I'd cry over missing a prayer by mistake. I wish I could go back to that, but my iman feels so weak and I don't know how to fix it.