E90s don't have clutch springs. Dual mass flywheels move that part to the flywheel itself - you flywheel has failed, not the clutch.
Did you reuse the original DMF? Otherwise, it could be anything - bad parts, abuse, improper installation, etc. A new clutch and flywheel should last 200k miles, but all bets are off if you reused the original flywheel..
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