The person taking credit for everything eventually receives blame for everything too.

Credit and blame are attached to the same claim. Once you have established that outcomes flow from you, that claim holds in both directions, and the reckoning arrives eventually. The people who took everything on the way up are the ones with nowhere to stand when something fails.

Share the credit for reasons beyond generosity. Accurate attribution builds a group that will stand with you when something goes wrong, which is the only insurance that actually works.