The software upgrade is horrible on Samsung phones and it has been like that for a long time, I like Samsung phones but lack of software update made me going to switch to different phones like apple to appreciate the software support for years.
"Software support for years" sorry, but I'm not going to keep a phone for more than 3 years.. phone comes with android 9, gets android 10, ends on android 11, gets another year of security patches.. I'm good with that. I dont need an iPhone 6s, from 2015, on it's 2nd battery replacement, trying to run iOS 13.2.whatever with a ton of bugs. Have fun with "Software support" on iOS.. every fall you'll have a mystery update once a week that breaks your fun in a new and exciting way.
And I used the note 4 for years. It wasn't till 2 years after stopped pushing updates to it that I finally updated phones. And s8+, note 8, or s10+ has beat my experience with the note 4. If I like a phone I'll use it for years.