What we can't get over is the fact that HaShem came to Mitzrayim to take us out, while we didn't do anything special, not even being loyal to HaShem, stil He came and took us out ,spilt Yam Suf and guide us to Har Sinai.
HaShem gave us His Torah and made a Covenant with us, He choose us from all nations and that is something we shouldn't take lightly. Somerhing that started more than 3000 years ago is still happening.
Reading the Haggada en the Seder we keep, saying HaShem took us out of Mitzrayim. We should never get over de Chesed and closeness of a meaningful and loving relationship with HaShem.