16th November 2024
The hosts went down by a margin of 135 runs in the final T20I at the Wanderers on Friday after the tourists racked up a record total of 283-1 in the first innings.
Walter has now overseen seven bilateral T20I series and not won any of them, with plenty of senior players given time to rest at different stages.
While the Proteas did make their first-ever ICC final at the T20 World Cup in earlier this year, the coach admitted the results in bilateral series is difficult to accept.
"Every coach has great pride in the job they produce," Walter said. "Ultimately the performance of the team rests with me because I'm the head coach, so I'm responsible for that."
"To lose a series and to lose games of cricket never sits well, and if we don't move forward as a side, that doesn't sit well either because ultimately we need to be continually moving forward at the very least."
When asked to explain the difference in results when playing at the global tournament and in bilateral series', Walter pointed to the players that he had available.
He added: "The easy answer is that when we go to the world tournaments, we're picking our very best 15 players but we can't pick those same 15 players every single time we play.
"It's just not feasible. It's just too much cricket. So, the rest of the time we have to build our base of players up to be to the same level."