Baby fussy when drinking

Hi mummies, my LO usually very tam jiak and has been drinking well and alot since birth. Now he is 7 weeks old. However recently he started to become fussy when drinking..drink stop drink stop den dun wan to drink..tried change to slower teat or faster teat still same..wondering wads wrong? Attached feeding details..or should breastfeed better? I am using avent bottle teat size 0 and size 1, should I change to size 2 teat? However I am trying to give him slower flow teat as I wan to train him back to breastfeed. He also vomitted the milk out.