Splunk was already a complete disaster before those two. They may have been poor leaders but it was impossible to turn it around. Splunk shot themselves in the foot by implementing single tenant on-prem solution and it's not cloud as cloud is multi-tenant and Internet-facing. They couldn't scale, support, and secure customers environment and it went under. Prior to them the Splunk cloud and engineering teams were EXTREMELY poor and had ZERO experience. They basically exported Splunk Enterprise onto a virtual machine and thought that's all they needed to do. RE--RDS. They also got hacked in a major breach in 2018 and had basically nothing in place to demonstrate they were operationally qualified to support their on-prem customers. They had no qualifications.
Those two inherited an inferno and messed up. Their biggest regret was being convinced they could make Splunk Cloud a success but at this stage it's impossible. Their biggest career regret.
Splunk also had a huge problem with harassment, discrimination, and wrongful termination and anti-Semitism and that had nothing to do with those 2 former AWS execs.
I saw everything and know everything.