Hipster isn't just about hating mainstream things. Firstly, no hipster will ever say they are a hipster, as that would make them part of a larger cultural sect which is exactly which they don't want to be. Hipsters will like a band that then gets popular and stop liking the same music they liked last month. Some people with weird tastes happen to come off as hipsters. Active Hipsters are just awful though.
Why did Estratti take our the Celestial Collonade in game one? He could have destroyed the angel and then Finkel only wold have been able to activate one collonade per turn and attack with one creature instead of both collonade and angel because of the second collonade.