An m1 at 89% will outlast most new windows pcs.

Think the rated battery life at 100% is 10-18 hours.

I think as long as you bought enough ram and storage for your needs long term it’s a great option.

M1 or m2 would depend on how long you need to keep it and have OS updates.

I’d look at your storage and battery. Try offloading old photos to iCloud, there’s a setting to do so. Delete unused apps.

Try a battery replacement. I did on my 13 that was 2 years old and having a simulator issue and it fixed it.