Why might Germany have opposed the Lend-Lease Act? 1. It failed to provide Germany the support it needed.
2. It allowed the United States to send aid to Britain.
3. It encouraged voters to reelect Franklin D. Roosevelt.
4. It brought the United States into the war against Germany.

Number two.

we weren’t formally in a war, but we were still sending resources and money to britain. there was already very little chance of germany and the us joining forces. at the time, most people didn’t want to join “another european war”. after pearl harbor, we declared war on japan. then germany declared war on us, without any major conflict happening between the two nations. the lend-lease act wasn’t one of the main reasons the us was brought into the war. hope that helps :D