You can't just look at revenue (ROAS) and gross profits when evaluating ads.
Consider the two scenarios:
A: $58k spent, 1.45 ROAS, $70 CPA, 828 Purchases
B: $25k spent, 2.0 ROAS, $50 CPA, 500 Purchases
A has more revenue and more gross profits, but B yields more net profits.