Fitbit should replace your device for free if it breaks within its warranty and you have bought it brand new. It’s a long warranty (if I remember rightly 2 years) I had my charge 3 replaced once and my versa 2 was replaced 3 times! It was shit and claimed to be waterproof but the evidence said otherwise.
I have an Apple Watch now and I love it, I love my gadgets and try to use as many features as possible and use it for calls, to listen to music and books, to measure my health and fitness etc…
I bought my partner the basic SE watch which is the much cheaper version but does what he needs and is more like a very fancy Fitbit. If you wouldn’t get the full use of an expensive Apple Watch then the SE would be more reliable then a Fitbit. It’s also more accurate as I swim for an hour 5 days a week and my Fitbit counted that as steps, the Apple Watch counts calories, lengths, meters, strokes etc…
OP said she averages 10,000 steps a day but that doesn’t mean she’s doing that a day. I have days where I’m very active and do over 20,000 steps because I’m trying to lose weight. There are also days I only do 5,000 - 7,000 but it can average as 10,000+ because of the days I do more.
I have to walk 4-5 miles to do 10,000 and certainly couldn’t do it in my small house! Even on the days my Apple Watch says I’ve been standing over 12 hours and I’ve spent hours cleaning it’d only be 4,000 - 6,000 steps.
Since I had my Apple Watch from last June I’ve done a lot more exercise then before because I like to close the rings that are for daily goals of hours standing, calories burned and time moving.