I agree OP. Seagull was mentioning this idea on his stream the other day: Genji was overpowered for two weeks and got nerfed, but supports and tanks stay broken for many months to even years. Look at heroes like Mercy, Brig, and the prevalence of double shield Sig/Orissa.
There’s some lack of awareness or bias with the devs going on. Brig has been a must pick since she was released. Mercy was a must pick for years. We’ve had double shield meta since Sig release… but two weeks of Genji being strong and it’s fixed. Smh