Umar introduced holding of Talaq without the witnesses!!

They must also take notice that Qur'an makes it Obligatory to take 2 persons as witness when one wants to give Talaq:

Thus when they fulfil their term appointed, either take them back on equitable terms or part with them on equitable terms; and take for witness two persons from among you, endued with justice, and establish the evidence (as) before Allah.

Al-Qur'an Surah 65, Ayah 2 (Translation by Yusuf Ali)

Umar, by imposing the law of pronouncement of three divorces at same place and same time, also abandoned the rule of taking witnesses. (According to Shia Fiqh, divorce can only take place in the presence of two witnesses).

If you want to know about the evils of this innovation, then you must go to the courts and police stations of Pakistan (and certainly in the other Islamic countries too, but I am only witness in case of Pakistan). You will see strange types of cases in court. For example, women come in courts and claim that their respective husbands divorced them thrice in anger. But their respective husbands deny any kind of divorce.

From the prospect of women, they are telling the judges in courts, that they cannot stay any more with their men as they divorced them thrice in anger. And now they have come back to their senses and don't want to give them freedom. And if they are compelled to go back to them, then it would constitute (as they have become Haram for them after getting divorce).

[Especially, in uneducated families of sub-continent, this evil is very common.]

What choice has been left for these innocent women?

If western world criticize this as humiliation for women, are they wrong and ONLY spreading false propaganda against Islam?

Note:
The Salafi Alim of Saudia published Qur'an, writes in the commentary of 1st verse of Sura Talaq, that Imam Ibne Qayyam and Imam Ibne Taymiyyah don't accept the concept of Talaq Bid'a i.e. the way of divorce innovated by Umar.