It is well known Grant was intimidated by General Lee. Those sound like jealous words - if you'll remember the paths of both men after the War it makes sense.
Well known by whom? Grant never showed a sign that he was intimidated by Lee. Quite the contrary, Grant never atopped attacking Lee and finally won out.
Yeah he was so intimidated that he almost didn't accept Lee's surrender. </sarcasm>
Respect, not intimidation. No one intimidated Grant. This does not mean Grant did not take into account his opponents abilities.