S.H.I.E.L.D. still did good things for the world, take Agent Carter for example and even Maria Hill and Nick Fury. Shield had always been the peace keeping force that it was, but Hydra still did things such as the events of Winter Soldier that tarnish the S.H.I.E.L.D. name. S.H.I.E.L.D. has always been the good guys.

Is shield in Marvel good or bad?

Obviously, Secret Empire has raised the bar for Hydra, but S.H.I.E.L.D. has come pretty close to being just as bad. In some ways, S.H.I.E.L.D. is worse, because it's supposed to be a force for good in the world, and has the full support of world governments.

Is shield a HYDRA?

After the events of "Secret Invasion", Nick Fury discovered that S.H.I.E.L.D. is under the control of Hydra, and apparently had been from the beginning.