Listen, I'm all here for free expression through literature.That's Wattpad. We're all here for that. But literature is too beautiful to destroy it with low quality stories extremely poor grammar, mistaking 'your' or 'you're' or not knowing when to use cap locks or when or the difference between 'to' or 'too'. Sure, there can be 2 o 4 mistakes, but when the whole story is a complete grammar mess, there is a problem.
A lot of stories have great plots but the writers mess up when they execute the story.
It's not about expression, it's about education.
I'm in no means the greatest writer on here or anywhere else by that matter, but you don't have to be an expert on something to give your opinion or advice. You only have to be objective and have common sense. All I'm saying is... Read as much as you can -like, actual books-.
That's the best and only way to be a good writer; reading.
I'm not trying to offend anyone, so don't get offended. It's called constructive criticism and any writer should be able to take it and learn from it.