The AAP said on Saturday it was disappointed it did not win the Punjab assembly election but added that even becoming the main opposition was an achievement."We were hoping to form a government in Punjab," Aam Aadmi Party leader Ashutosh told IANS. "We are disappointed with the result," he said, as vote count showed the Congress sweeping to victory in assembly election."But for a new party (in the state) even coming at the second place is also a big thing," Ashutosh added. "Don't underestimate this."He said all the AAP leaders needed to introspect where the party's assessment of taking power in the border state with more than 100 of the 117 seats went wrong.