Project 2025 was publicly available prior to the election. Tariffs were one of the many policies within the larger plan. If you voted for Trump you are responsible for the Tariffs, this is not a hoodwink where Trump rug pulled everyone after getting elected — it was literally there in the open.
Even beyond/disregarding Project 2025, tariffs were a well-known part of the GOP platform in 2024; it was even included and discussed at the Presidential Debate. The Harris platform even called it a tax at that time, to attempt to make it quite clear to the voter who, in the end, would bear the cost, and the Trump platform equivocated on who would pay the tax to distract from that Harris was right.
Even if you knew nothing of Project 2025 (somehow), you were warned.