Their VPS pricing is competitive but pretty much everything else isn't. Specifically, I'm looking at EKS vs DO managed k8s, block storage for VPS's, and so on.
Lightsail also offers load balancers for $18/mo compared to DO's $10, $30, or $60 per month.
DO $15/mo managed DB 1G 1vCPU 10G SSD
AWS $15/mo managed DB 1G 1vCPU 40G SSD
I'm really not seeing how "pretty much everything else isn't" with respect to their offerings.