get off on the wrong foot
US /ɡɛt ɔf ɑn ðə rɔŋ fʊt/
UK /ɡɛt ɔf ɑn ðə rɔŋ fʊt/

1.
to start a relationship or activity badly
:
•
I think we got off on the wrong foot when we first met.
•
The new project got off on the wrong foot due to poor planning.