John As A Guitarist

I perused some Youtube videos that address the question of how good
Lennon was as a guitarist.
The handful of Youtubers I saw all tried to answer the question
positively.  And they supported the conclusion that John was a great
guitarist (and songwriter) by demonstrating John's parts on songs like
"Norweigian Wood," "All My Loving," "Ticket To Ride" and other songs
from this period.
Oh -- one person played "I Am the Walrus," but included the orchestral
stuff, which was actually written by George Martin.
I agree that the earlier parts were great guitar parts and songs.  The
problem is, John didn't maintain his abilities as a rhythm guitarist and
songwriter.  I'd add that his post-"eating LSD like candy" guitar parts
were often feeble.  The exceptions are some of the White Album songs,
where he used a version of the picking technique he had learned from
Donovan Leitch in India.