@M. Sarmad I don't know what's up with the Muslims, especially Pakistanis (not talking about you, just in general), of PDF. Does everything have to be in the Quran in detailed form for them to accept it?
The Namaz isn't talked about in detail in the Quran but we have Surah Kahf which has been mentioned by multiple scholars of different schools to be a protection against Dajjal.
On the other hand, one logical question would be as to why Isa R.A would be returning if not to kill Dajjal? It has been said (if you didn't know about it earlier) that he will return after the Mahdi & Dajjal have appeared, to kill the latter.
More than 90% of the Muslim world believes in the return of the Mahdi, Ad-Dajjal, Isa ibn Maryam R.A. but on PDF....I see such stark remarks...someone even went on to say that they're no different from the myths of the Egyptions & the Greeks...
Muhammad SAW had already told in his speeches against Dajjal that
every Messenger & Prophet before him warned his People about Dajjal, so there you go, we aren't copying any "myth" but those myths are distorted versions of the warnings given to the people of the past.
As for the mention of Dajjal in the Hadiths...the evidence is below.
https://sunnah.com/muslim/1/305 Sahih
https://sunnah.com/urn/740770 Sahih again
https://sunnah.com/bukhari/92/68 from Kitab Al Fitn (Book of Afflictions & End of the World)
I'll post more material if anyone's interested or wants to talk more on this.