[moooo99]

I doubt that there are any reputable sources you could find that aren't shaped by bias (of MS or competitors). However, I have worked in a non-IT related job for years and about 90% of complaints about software we use would fit into one of two buckets

1.) Microsoft Office

2.) SAP

I know this is merely an anecdote, but it aligns with my personal experience + with the experiences of friends and family