I do startups generally for a living. But I have had a pretty extensive corporate life previously, managing teams and building tech products/services.
One thing I have learnt over the years is that you need different people for different phases of the product/company's a development/life cycle. (A company/product has like 5 stages though some say six.)
I am pretty good at the embryonic and the take-off stages -- from a piece of paper/idea to a product ready to deliver into the market. But get bored once it goes past that phase. I like chaos and making it into some stability and semblance of structure.
Ole played a role in streamlining, to put it euphemistically the organisation with a cultural re-set. A change agent. Putting out the fire so to speak and steady the ship. Trust me, in my experience, this is a horrible job that is part political but also goes unappreciated. But without it, it would be tough if not impossible to implement the next phase.
In order to put the foundations for the 'take-off' stage, we will need a Rangnick to go from a less chaotic but stable situation and put some proper foundational changes or structures into the United organisation. Lots of strategic planning and execution plans. But the United organisation has to be ready to accept these changes too.
This is why Rangnick wants to stay on to see if his project will live on.
Bottomline, you need different people for different phases of the organisation's development. Ole played his role and should be appreciated in the long term for what he had done after the shitshow of the Jose who dealt with the remnants of LVG.