The best replacement I’ve found for my just under ~1TB of data is Backblaze B2.
I’m attempting to move my old data over by downloading it using the Amazon Cloud Photos crap program to download my history to my computer and then using Cyberduck to upload it all again to B2.
The main problem I’m coming across is sometimes the upload to B2 fails and recovering / resuming from that is a total pain in the bum.
It is tempting to scrap all my history and start the backup from fresh - but sometimes I’ve had to go back in time to earlier backups… so risky choice.