Thank you for the write-up! I did not know I have been erroneously omitting commas in English. In Slovenian, my native language, commas always delimit clauses

Thank you for the write-up! I did not know I have been erroneously omitting commas in English. In Slovenian, my native language, commas always delimit clauses in a sentence. We got that from German, which got it from Latin. I still don't understand why English chose to omit commas in some cases. It just confuses the reader of larger sentences. In some fiction books the omission made some sentences completely unreadable. Granted, it was the author's fault but still... Why?