The home/swipe related bugs seem to be related to accidental touch detection and/or swiping before animations fully complete. For example this morning I had to reboot my phone because I couldn't swipe to unlock from the lock screen. It was stuck in 'notification mode' so it thought my swipes were to view my notifications instead of unlocking. Immediately before this happened I had cleared all my notifications which resulted in a very choppy animation. My previous reboot before this was caused by getting stuck in Music after trying to swipe down in Music to get off the 'now playing' screen. For some reason this always requires multiple tries so I probably set off some accidental touch detection lockout.
It's a death by a thousand paper cuts thing. There is no one bug that can be easily fixed. It's dozens (maybe hundreds) of small annoyances like the keyboard absolutely refusing to register a keypress that goes against it's prediction of what I want to type. Another fun one is I get floods of old notifications randomly usually from phone/messages -- like a voicemail notification from a month ago. I don't even care if Siri doesn't work well or if I have to enter my PIN slightly more often because of FaceID. I just want the fundamentals to work reliably.