original: In private, Hindenburg often complained that he missed the quiet of his retirement and bemoaned that he had allowed himself to be pressured into running for President.
simplifications: In private, Hindenburg often complained he missed his quiet retirement. He was upset that he was pressured into running for President. Hindenburg often complained that he missed the quiet of his retirement. He also was grumpy about being pressured into running for President. Hindenburg missed the quiet of his retirement. He would complain that he allowed himself to be pressured into running for President. In private, Hindenburg often said he missed the quiet of his retirement. He regretted being pressured into running for President. In private, Hindenburg often complained he missed the quiet of his retirement. He was upset he had let himself to be pressured into running for President. In private, Hindenburg would complain about being pressured into running for President. Hindenburg often privately complained he missed the quiet of his retirement. He bemoaned allowing himself to be pressured into running for President. Hindenburg often complained in private that he missed the quiet of his retirement and didn't like that he allowed himself to be pressured into running for President. One on one, Hindenburg would moan about missing retirement and mourn that he let himself be pushed into running for President. In private, Hindenburg often made a fuss that he had missed the quiet of his retirement and grumbled that he had allowed himself to be forced to run for president.