People may tell you that your belief is weak if you keep crying. Your parents may tell you if you prayed more, you wouldn’t be depressed. The imam at the masjid may say if you read Quran more, you’d be a better believer and wouldn’t be sad and have these problems.
But then you do pray, and you’re still unable to stop crying. And then you do read Quran, and your depression is crippling. And you do make dua - sincere, overwhelmingly emotional, present dua - and yet you don’t feel better and you feel like nothing has changed.