Johnson pulled his own bill because the remainer parliament would have tagged revoke/remain conditions such as second referendum and customs union on to it.
Even now, in remainers most humiliating hour, more embarrassing for them than the actual referendum, for this reinforces and doubles down on the people’s view - they seem to think spouting nonsense like the above will be taken seriously by the electorate. You’ve failed twice now - time to think about your own arguments instead of banging your head against a wall.