I should always keep in mind that doing writing too late removes all the joy. Dunno why, it’s probably an energy thing.
What I think is that I don’t spend my energy correctly during the day, therefore at the end of the day I have less willpower and energy than I thought it was possible, leading to frustration in writing and “hell, I wish it was faster”.
But writing is rarely so fast, it takes concentration, time. It requires you to be creative, passionate, to do things that work out.
That’s why I prefer doing it in the morning.