sql sERVER PARSE DATA BY HOURS AND COLUMNS

My code below does produce results.
I am kind of "brute forcing" it.

I would prefer this to be more "dynamic"
AND
That the column headers reflect AM and PM without massive code

DECLARE @SQL VARCHAR(MAX)
SET @SQL = 'SELECT  ''Summary Records'',
	COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 0 THEN 1 END) AS CurHour,
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 1 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -1 AS VARCHAR(2)) + ']'',
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 2 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -2 AS VARCHAR(2)) + ']'',
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 3 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -3 AS VARCHAR(2)) + ']'',
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 4 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -4 AS VARCHAR(2)) + ']'',
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 5 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -5 AS VARCHAR(2)) + ']'',
    COUNT(CASE WHEN DATEDIFF(HH, DateAdded, getdate()) = 6 THEN 1 END) AS ''['  + CAST(DATEPART (HH , GETDATE()) -6 AS VARCHAR(2)) + ']'',
    COUNT(*) AS TOTAL FROM SendGridSummary
WHERE (DATEDIFF(d, DateAdded, GETDATE()) = 0)'
EXEC(@SQL)

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Current results

Desired Results