Can I go to Strasbourg?
A pre-check of the conditions the Court applies before it looks at a complaint at all. It covers what you can know from the facts — it does not judge whether your rights were violated.
The European Convention on Human Rights is not EU law. It is a Council of Europe treaty binding 46 states and enforced by the European Court of Human Rights in Strasbourg — a different court, a different procedure, and a strict deadline.
Step-by-step legal guidance hasn't been verified in Dansk yet, so it's shown in English below. The interface is in Dansk.