If amazon's own RDS is that bad, can a startup (or MariaDB itself) help? Hopefully one can offer "optimized/certified" MariaDB instances -- by buying regular E

If amazon's own RDS is that bad, can a startup (or MariaDB itself) help? Hopefully one can offer "optimized/certified" MariaDB instances -- by buying regular EC2 machines and then installing and managing the database on them. The price of db.r5.xlarge is $0.48/hr vs regular r5.xlarge of $0.25/hour, so people are obviously willing to pay for the managed solution.