I don't think that spinners such as Axar and Shahbaz are suitable for these conditions. I would have preferred someone like Ravichandran Ashwin or even Yuzvendra Chahal. Washington Sundar did his job well, but the same can't be said about the performance from Axar/Shahbaz in the first two matches. Also, the Indian selectors need to decide whether they want good spinners who can't bat much, or average spinners who can contribute with the bat in the lower order. The preference as of now seems to be for the latter category.
Look like Indian selectors doing some experiments but fail to have their targeted results because too many players in last few ODI's looking not good with now we have just 10 months left in ODI world cup they need to give final shape with their best available players, but they are not having any intention for doing things like these and lost three ODI's from last five matches are giving all details about their strategy now most chances we will have K Yadav for the last ODI against Bangladesh and Shakhar Dhawan is coming for Rohit Sharma hopefully they will avoid whitewash as they were not expecting result like this even we all know Bangladesh won 13 bilateral series out of 14 which is amazing stuff from them in this format, but hopefully things could be positive for India in coming months.
If I remember correctly, the pacers of India actually gave Bangladesh the most amount of problems in this series. The Spinners actually did not pose that much problems. But the fastballers that India are playing right now, they do not have the most amount of pace. They do have a good swing. But once the ball is soft, and there is no swing in an offer, they do not have much to offer honestly.
And I also agree with @Sithara007 about the spinners that India is playing. I think leg spinners could have been much more effective in these situations. Bangladesh also do not have much experience against the leg-spinner. So, I think they missed a trick here.