Stuck in a cycle of losing my spiritual footing after striving to be consistent?

Assalamu alaikum. I keep going through this same pattern: I work hard to get closer to Allah SWT and stay firm on my deen, and then, almost without noticing, I slip back. I'm trying my best to avoid it, but it happens so easily. I'm making my prayers and dua, asking Allah SWT for help and guidance through this. Does anyone else go through something similar? It's like I reach a point of spiritual exhaustion, and slowly, that consistency I built just fades. I'm mostly looking for some reassurance and advice. Maybe it's the everyday stress of life that adds to it, I'm not sure. Whenever I falter and then have to rebuild, I feel so much guilt. I know we are only human, we are not perfect, and Allah SWT is Ar-Rahman, Ar-Raheem-the Most Compassionate, the Most Merciful-and His mercy is always open. Sometimes this whole cycle even makes me question my own sincerity. JazakAllah Khair for any kind words.