Here's what you quote:
> Also – and here I hope I shall not sound absurd – I was from early days grieved by the poverty of my own beloved country: it had no stories of its own (bound up with its tongue and soil), not of the quality that I sought, and found (as an ingredient) in legends of other lands. There was Greek, and Celtic, and Romance, Germanic, Scandinavian, and Finnish (which greatly affected me); but nothing English, save impoverished chap-book stuff. Of course there was and is all the Arthurian world, but powerful as it is, it is imperfectly naturalized, associated with the soil of Britain but not with English; and does not replace what I felt to be missing. For one thing its 'faerie' is too lavish, and fantastical, incoherent and repetitive. For another and more important thing: it is involved in, and explicitly contains the Christian religion
And here's what you missed:
> Do not laugh! But once upon a time (my crest has long since fallen) I had a mind to make a body of more or less connected legend, ranging from the large and cosmogonic, to the level of romantic fairy-story – the larger founded on the lesser in contact with the earth, the lesser drawing splendour from the vast backcloths – which I could dedicate simply to: to England; to my country. (…) I would draw some of the great tales in fullness, and leave many only placed in the scheme, and sketched. The cycles should be linked to a majestic whole, and yet leave scope for other minds and hands, wielding paint and music and drama. Absurd.
Indeed it was long ago when that attempt was aborted: it was the Book Of Lost Tales which would have been the missing Anglo-Saxon mythology but that has been abandoned around 1920. Christopher Tolkien clearly stated most elements defining and peculiar to BOLT are not present in later works. There are many versions of the Silmarillion but there's only one version of BOLT.