Feeding issues for 2 month+ baby

My 2month+ LO is taking as long as 50min to finish one feed. During feed, she will play with bottle teat, become fussy, cry or become sleepy. Most of times, my LO can finish her feed by calming her down or finding ways to keep her awake.. but it's really very frustrating . We have even increased the teat flow but things are not improving. Did anyone face the same issue before?