Windows XP
When Windows XP first released, people criticized it for having a theme that they hadn’t seen before in Windows. People thought it was very kiddish and appealing to children, not being taken as seriously for the large userbase of the time. There were also criticisms about how fragile Internet Explorer was (I’m not kidding, I was there and Internet Explorer back then was at its most insufferable.).
But these days, just because of how bad Windows 8, 8.1, 10 and now 11 have been, people have praised Windows XP so much.
Yeah, in my house growing up we had Win 3.11, then 95, then Me.
Windows Me was so bad my dad ragequit and switched the family PC to SuSE Linux and never looked back. And, to be clear, Linux back in the early 00s was often not a pleasant experience, but it was better than Me.
I eventually built my own gaming PC and ran Windows on that, but even then it was a pirated copy of 2000. I only ever encountered XP at school.
I was too young to understand the OS but I remember it kept crashing and getting in trouble like it was my fault.