Michael Tsai has a good summary of the situation that he wrote when Arq 6 was just out, and echos my recollection of issues with data loss [1].
I run backups on three Macs every 48 hours, then once a month or so I will use Carbon Copy Cloner to clone the two more important ones to sparse image files on a backup hard drive which is physically secured afterwards.
I'm sorry you feel support isn't responsive. We aim to answer emails within 1 business day, as we always have. We've added staff to do this.
I don't have any particular support complaints myself; my comment was based more on perception based on Twitter & other discussions I'd seen.