There are ahkaam in Quran that changed. The new one takes over as a rule. However saying that Prophet s.a.w sunnat can go against Quran is not accpetable as a muslim.
Bro am sure Mirza Ghulam Ahmed Qadyaani was more learnt than most of scholars of his time. If all the other scholars r rite doing there interpretation of Quran than why is Mirza Ghulam Ahmed wrong ? why can’t his theory of Khatmin Nabiyeen be valid just like other scholars have there own interpretition.
giving someone an edge on being more learnt is acceptable but we as ignorant public have right to ask questions and answer cant be that scholar knows more than us so he is rite. Thats what a hindu wud say that their padri at mandir is more learnt than u hence he shld follow the padri and not listen to u.