My point included ,the fact that Paul was using his “special revelation” of the supper to “correct” abuses, and behaviour inconsistent to its character.
But the fact that Paul the Apostle had first given to the church at Corinth,that which he received directly from The Lord . Before that he is seen having to correct them.This is more the emphasis;(not because others could not have given the Corinthians this at this period ), but that this personally was brought to light for Paul to teach)
What was this (revelation) that he received ?
1Corin11:23," That the Lord Jesus the same night in which he was betrayed took bread

explaining the whole sequence of the supper,through to verse 27.)
Now why ,if after three years,did Paul who visited Peter at Jerusalem ,and then stayed fifteen days,(and before this he was with The early "church " at his conversion)
and also met with the Lord’s brother James.( Galations 1:18,19) Was an adequate understanding not acquired ? Because it was yet another 14 years of seclusion (Gal2:1) being taught of The Lord alone,before his ministry truly begins Gal2:1 with Barnabas.
Surely Paul would have been well versed in the practice by then, having no further need of a personal revelation of the " Last Supper", application and practice?
Was Paul’s early walk still with eyes still blinded?
Did the the other apostles forget to mention the (if it was so prominent and at the forefront) basics in instruction?
Or is The Lord dealing with Paul the dementia sufferer, who needs often to be reminded of the basics of daily living?