These things cannot be rushed. The powers that be must, first, agree the he is to go. Then a replacement is to be found. This, alone, can take a long time. The candidates must be available and of the precise quality necessary, this time it just has to be right. There could be several candidates to be interviewed, and possibly, re-interviewed. We are to believe that there are. Then the selection process. Once the appropriate selection has been made, the negotiations begin. More time. Negotiations can break down and re-selection might happen. And so on and so on.
We must be patient and hope that, eventually, the correct decision is made. The important thing is that he goes and is replaced by a manager of much better calibre who will take this club back to where it belongs. If that takes til the end of the season or even beyond, it's alright by me.