I blue shelled myself...

In a situation like this, how is a player supposed to react? Maybe by shield-bashing away if there's an enemy nearby?

Because otherwise, there's just way too many projectiles at once which would break the shield immediately when blocked, leaving me defenceless. This also happens a lot.

Replaying DOOM: The Dark Ages on Nightmare with adjusted sliders to make it harder. The game is more fun like this, but it's also revealing the majority of my deaths to be from stuff I can't even see.

What's killing me here? It can't be the arachnotron bombs. This stuff is very frustrating.