I hate Excel, not because it's a bad program but because in my experience people misuse it more often than not. Excel excels at creating spreadsheets. Spreadsheets are pretty reports used to report tabular data. Excel is capable of so much more, but for eveything beyond spreadsheets it's medicore at best and its complexity often makes it a liability. It's a bad calculator. It's a bad database. It's a bad medium for t…
It's also something that most people in most businesses have installed and as such, can be incredibly helpful for sharing data, models, etc. The collaborative editing in Office 365 adds a new dimension in that (finally) we don't have to email round documents and implement half-cocked versioning any more (though plenty of people still do), and multiple people can make changes at the same time.
If you want to slag off any of the applications in Microsoft's Office suite then the correct answers (and I don't think this is particularly controversial) are Outlook and Teams. If you want real productivity destroyers and daily pain, look no further.
Excel? It's great.
Yes, it can be misused, but so can Python, Rust, C++, JavaScript, and every other tool, language, and platform at our disposal. So can a circular saw for that matter. That doesn't make any of them bad tools.