Has the Nigerian Government actually "WEAKENED" the "Boko Haram" Terrorists???

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In his address at the ongoing UNITED NATIONS' GENERAL ASSEMBLY, the Nigerian President , Mohammadu Buhari averred that his government has "weakened " the "BOKO HARAM" terrorists operating mainly in Northern Nigeria.

Punch.com news link::
https://www.google.com/url?sa=t&source=web&rct=j&url=https://punchng.com/though-weakened-boko-haram-still-active-in-nigeria-buhari-tells-world-leaders-at-unga/%3Famp&ved=2ahUKEwiW66zkr5jzAhXPhVwKHWo4DicQFnoECDAQAQ&usg=AOvVaw2oJhOKIQH1LcalCVnpUoS_&ampcf=1

As a follower of event in Nigeria , can the President be confirmed to be saying the Truth ??

Has Boko Haram been decimated as he alleged ??

If they are actually "weakened " , why are they still very effective in kidnappings , bombing and other heinous cres against Civilians in that African nation??

What are your suggestions to hold or eliminate terrorism from Nigeria ???