How do you measure how much MS Teams sucks compared to Slack? All the CTO knows is that they have an enterprise license for Office along with Teams and the sale

How do you measure how much MS Teams sucks compared to Slack? All the CTO knows is that they have an enterprise license for Office along with Teams and the salesperson they talked to showed them how great it integrates with the rest of the suite. In the EHR space, all the CMO (chief medical officer) cares about is it helps keep them in compliance. Why should they care if it’s hard for their office staff to use?