Please help I'm tired of cat smell and my family !!!!!!!!!!!! 😭

So I adopted a male cat a month ago and the cat poop smells really really bad like too much bad it filled the whole house but handling my family is even worse they are very toxic the cat is only good thing in my life right now but my family wants me to let go of this cat because the whole house is smelling very very bad and they are fighting with me daily because of it I cry every time and I'm tired of it.

The male cat is 1 year old and he is not neutered so he always wants to go outside and want to mate so try to escape and mewos all the time so I'm getting him neutered soon. But I don't want to let him go and I am tired of all the fights also. Also I give him dry cat food only because we are vegetarian.

Plus my cat always wants to escape idk if I should put the litter box outside since he will run away so suggest a solution please

Extra information: I use a plastic tub and sand as a litter I'm attaching the picture and the whole room plus varandah is smelling please give me solution idk what to do