Question

what is wrong with the sentence "I have been hating him all these years "

Answer 1

I had been hating him all these years

Answer 2

In the sentence –‘I have been hating him all these years’ there is a problem of tense.  

First half here is in present continuous tense while ‘all these years’ depicts the past.    

The right sentence here will I had been hating him all these years o I have hated him all these years.