The UI: That is suggestive.
But in regards to the rest. I'm not trying to "disprove" you, just going off my own experiences:
Crashes: I never had one crash using Windows 7. I did during my XP days (BSOD) maybe twice or so. I also had a similar about of crashes on my Power Mac G5.
Freezes: Never had a freeze on Windows 7 (that I could remember at least).
Malware: Never had a virus/malware in four years under Windows 7 while using AVG and MalwareBytes AntiMalware. I did have a few "false positives" from some websites, but based on a quick Google search, they were most likely false positives.
You obviously seemed to have a different experience as I did using recent operating systems.