Ima be honest, I use it like all the time and I've never had a problem with it. Especially to the degree that you're saying you had in just 10 min.

If youre fluent with Office tools then you should be able to use it.

The only single thing I noticed explicitly that bugged me was it not opening template files as a new file so if I saved it would save over the template.

You can argue that the math editor kind of sucks, which fair, if I was doing a discrete mathematics paper I'd be doing it in LaTeX which has like decades of modules and academia behind it