Somaliland want for separate is wholly based on Somalia’s failures. Somaliland has realized that Somalia doesn’t do anything for them and they want to procure their own future independent of them.
if Somalia was in a much better state, there would be no reason for Somaliland to separate but it’s gotten to the point where Somalia is literally a just a hopeless dead weight to Somaliland holding them back
When things were good you were ok with unity, when things started to get back you choose to separate.
Somaliland had the chance to take the leadership and lead ALL somalis towards the right direction. That's what brothers do, they help each other in times of hardship.