1 star experience only at the Singapore customer service department.
Kindergarten style of management. If you need to go toilet when it's not your fixed break timing, please inform the class monitor or teacher.
Micromanagement
If you need to go to toilet beyond an arbitrary "reasonable timing", be prepared to be questioned.
Office politics. To be fair this happens everywhere, but I was very surprised it happens in a call center because other call centers are well known to be free of politics at agent level at least. Was pretty glaring too. Like I said it happens everywhere, even in schools, just like in school, where you have teacher's pet and the rest.
Extreme high turnover rate gives clues about the environment. Vast majority of agents do not stay beyond 2 to 3 years, those who can stay 1 year and longer are considered seniors. Most leave in a matter of weeks or months, you see people come and go all the time. People leave due to high work stress (not easy to meet the kpi and multitasking, work processes are also tedious and everchanging) and on top of that still need to deal with people issues aka office politics. In other call centers you see people staying for decades.
Not much leeway for keen new agents who are late bloomers or need more time to cope with the steep learning curve, as it's very stats oriented.
Management critical of agents but don't apply the same level of standards to themselves. Give just 1 example, it is only fair to be punctual yourself before you criticise others for lateness.
Rules not equally applied, most glaring example is with regards to usage of handphone at workstation.