If you give a thought to it, Tia and Daksh are not the greatest enemies of ShivIka.
Shivaay himself is.
His mental block of khoon, khaandaan and lineage would be the biggest hindrances in him professing his love for her now and later will be a great hurdle in their wedded life.
So it is imp for him to get to know the true colors of Daksh and Tia as well as the false accusations that Tia had for Anika. His yesterday's heart to heart with Om proves that his heart believes in Anika but his mind and more prominently , his prejudices are stopping him from agreeing with his heart. His prejudiced mind against Anika (or more so that Tia and Daksh have a lineage/belong to good khandaan) and in his mind and her lineage is forcing him to question his heart.
Many are not liking the current track and feel that why should Anika suffer. Some have also gone to such an extent to say that she should let Shivaay marry Tia.
But the current track is necessary for ShivIka .
if you look at it both Anika and Shivaay are struggling .
Anika at the end of this all will emerge like 'Sita', victorious and will prove her self to be more than worthy of Shivaay.
And Shivaay will be waging a war with himself. His heart is at war with his brain. For his heart to win, both Daksh and Tia who he certifies to be of highest khoon, khaandaan and lineage will have to shake Shivaay out of his prejudices and beliefs. Once his mental block is lifted then only will he be worthy of Anika and will be able to respect her.