typomania
/ˌtaɪpəˈneɪɪə/ or /ˌtaɪpəˈmɑːnɪə/Definitions
1. noun
an excessive or compulsive desire to write or produce a large amount of text, often resulting in poor quality or incoherent writing.
“The blogger’s typomania led to a series of long, rambling posts that lost their readers’ interest.”