I don't know much about India experimenting with their bowlers but when bowlers and batsmen fail so miserably, everyone should be blamed. It's OK if they try to choose these youngsters for T20 matches but hope they continue with experienced batsmen in the test ones. Disappointed with Rohit's performance especially as he had enough time to rest but performed badly. Sundar, Chahar, Saini all couldn't take a single wicket and bowled at the economy rate of 6+ with Saini bowling at 12.5 which is itself shows how bad they were. Both the teams failed in the last match. Chasing down 134 runs so easily proves it.
It is true that the Indian batsmen failed to put enough runs on the board and this in turn put the bowlers in to a lot of pressure. But the inexperienced bowlers also failed to live up to their mark. For many of them, it was a rare chance to impress the selectors ahead of the selection for the 2020 T20 World cup, but there wasn't any extraordinary performance from any of them.
On top of all this, Virat Kohli earned 3 demerit points after he behaved aggressively to South African bowler Beuran Hendricks. The T20 series is over now... what's left is the ODI series and the three test matches. I don't think that the selectors will think about too much experimentation, either during the ODIs or for the tests. They should be fielding the full strength side.
They should have arranged for online booking. 
