I have a Garmin 810, which would crash mid segment, crash mid ride, freeze, all on the latest firmware.
It was intermittent, when it behaved it was flawless, then on bad days, i’d deploy the phone and stitch the ride together afterwards.
Bought a Bolt which crashed for the first time on boxing day in a year, firmware update to a very recent update and its a known issue and fixed apparently.
Bar that, Bolt has been amazing, prefer the screen, much better live segments, very sharp large display, great LEDs for showing current power zone, routes are ok but you need to plot on a map creator which gives cues, ie. not strava.
So I still use my Garmin for route following probably once a month in summer, as find the strava route builder way superior to others, but bar that Bolt hands down.
If I had to have only 1, the bolt again, and i’d perservere with the bad UI on komoot etc.