Not-a-Pilot. I have been involved in investigations, and there is one thing you have to realise is that the world does not stop for them because of one accident. There are only a limited number of people in each country working on accident investigations, and your latest accident comes on top of the pile of existing cases being investigated,.
If there are no casualties, the urgency is not there.
Then even if it is a simple case, when the preliminary work is done, a draft has to be circulated to all ( outisde ) parties to the investigation , such as manufacturer, country of registry , Operator, ATC service provider, other Investigations bureaus, (like NTSB, BEA, etc..) for comments. The whole process is long..
All in all , a generic statement , :about a year for a simple case, many years if complicated ( think TWA 800)
Just like Justice in a democraftic Country. Takes time.