To wish my dad would stop undermining my parenting?

[superstarheartbreaker]

Every time I tell dd off my dad rolls his eyes or goes "crickey she's only little." She's 5. Aibu to find this extremely annoying? He is too soft on her which I don't mind as he is grandad but still.

ask him what he expected of you when you were 5

or remind him how he was with you, if you can remember

my dad used to do the opposite

every time I started telling dc off for something he would cut in and tell them off himself

he is slightly deaf so it was not deliberate- but still undermining: he could have worked out from the fact that my lips were moving that I was actually dealing with the situation )

in the end I got my mother to have words with him