In polygamy man should give equal rights to each wife . How ever how can a man equally give love . Because its uncountable . Like prophet mohammed (pbuh) should love hazrat ayesha the most. Is it not unjustice to other wives

It is quite feasible for a man to share his love with more than one wife.
The parallel here is universal for a
Man to share his love with more than one child.

Islam says if you can give equal rights... if it's not possible for a person, then he should have only one wife.