I see your point but she never really dies, nor did the Avengers get mad at him, to be honest they were more upset that Namor triggered the Ebony Blade Curse on Dane Whitman.
Totally agree... but the discussion was going beyond her "death" and examining Namor's other actions... and whether or not he can/should be held accountable for the Wakandan invasion.
BTW... I really enjoyed the original Marrina/Namor storyline in the Avengers. The biggest disappointment for me? It took Monica (Captain Marvel) out of circulation.