Life is unfair and we just gotta accept it. People will always struggle with something, no matter what they do. Though there are still people who have less or more problems than others, but that's not the point, when it comes to your struggles, don't compare them with anyone else. You shouldn't care if others have a lot more stuff to go through than you do, because if you do then you won't see your problems as relevant anymore and you won't have enough motivation to solve them. We can improve, we can overcome, it's hard but if others have done it we can do it too right? We all wished we didn't have problems but unfortunately we have them, and that's not gonna change but we can change how we deal with them. And to answer your last question yes, everyone can be happy, maybe they'll need a leading hand or more, but yes, we can all be happy. I apologize if what i just wrote is hard to read or it's full of grammatical errors but English is not my native language