They've released new version that fixes this vulnerability: uTorrent 3.5.3 For Windows (build 44358) http://blog.utorrent.com/releases/windows/
I personally used 2.2.1 for years before moving to qbittorrent. Are you using the latest version of utorrent?
Only thing I like about utorrent is its small file size while having just as many or more features than others. But not worth to me dealing with those offers and ads. Sure you have workarounds but I don't want to deal with the annoyances.
Yes, few settings have to be changed to avoid ads (to be frank I haven't seen any, so I don't even know how they look). Since this are one time, set and forget modification I don't see it as a problem.
uTorrent Flagged as ‘Threat’ by Microsoft and Anti-Virus Vendors https://torrentfreak.com/utorrent-flagged-as-threat-by-microsoft-and-anti-virus-vendors-180312/
Want to try a client that is as small as µTorrent was back in 2005? Picotorrent is an alternative. Open source and not quite as "bloated" as the other great alternative qBittorrent.