Why did Imam Taymiyya say Abu’l-Ma’aali, Abu Hamid al-Ghazali, Ibn al-Khateeb had little hadith knowledge?

ASSALAM-U-ALAIKUM WA-RAHMATHULLAH, SIR, I WANT TO KNAOW ABOUT HUJJATUAL ISLAM HAZRATH IMAM GHAZALI ALAIHIR-RAHMA.SIR ABOUT HIS BOOK(IHYA-UL-ULOOM)IMAM TAYMIYYA(RAH)STATES:”If we assume that someone narrated the view of the salaf but what he narrated is far removed from what the view of the salaf actually is, then he has little knowledge of the view of the salaf, such as Abu?l-Ma?aali, Abu Hamid al-Ghazali, Ibn al-Khateeb and the like, who did not have enough knowledge of hadith to qualify them as ordinary scholars of hadith”. CAN U PLEASE CLEAR ME ON THIS. JAZAKALLAHU KHAIR