The answer would be of course YES ! The family did wrong to both of them ! Both of them should have the new chance if they find out that they could not continue anymore together.
The main subject of any relationship is LOVE - if there are no more love, from either side, then there are no more purpose of keeping such marriage or relationship to goes on.
Even in normal marriages it happens that people couldn't stay together from many reasons - it is not important, but what is important is THE MANNER how people are finding THE WAY OUT FROM SUCH SITUATION, avoiding any kind of humiliation or hurting the other side, to behave with respect to the partner in order not to loose self-respect . This is the main point !
We can only discuss here the reasons why he has hiding his new relationship from family and Anandi, as well as his marriage form Gaur ! The only reason is his character.
His character of a spoiled lazy boy grew into the character of a weakling, a coward man with lacks the courage to face the truth, to accept his guilt and admitted his mistakes and shortcomings. Strict upbringing, family pressure on him that at all costs must comply with set tasks of grandmother and father, long influenced family permissiveness has affect on the formation of his personality, which is unable to independently make a decisions and to accept the responsibility for his action.
This Jagat character and hardly he could be changed.