Sorry to hear you didn't get the grades you were hoping for! It can be extremely hard when you set a goal and don't manage to achieve it but don't give up. I am not 100% sure how the grading works but from what I can see 5 is still a decent mark.

Can you try focusing on one or two of your favourite subjects and aim for higher marks in those? It is extremely challenging to get extremely high marks in everything - we all have things that we are better or worse at than others - but it is often easier to do the extra study etc if it is something you are really interested in.