In general, "boycott" is not a good attitude to take towards one's church. I'm not in the best position to advise you because my conscience would not be bothered by a church that acknowledged Easter, but I do know something about keeping a guard on my heart regarding a church I'm not always pleased with. Attitude is very important. Would you be going elsewhere in a humble spirit, still appreciative of your home church, not feeling self-righteous about your decision? Or would you be going elsewhere in an arrogant spirit, intent on making a point, thinking yourself better than others, feeling unappreciative of your home church? Do not answer that question quickly or lightly. Take time to examine your heart and to get it right for worship. Proper worship is inherently a humble activity, and if you fail to worship with a humble attitude you will be the one failing to worship rightly. Your desire to worship rightly is a good desire, and it's good to pick a home church based on that, but I do think you need to pay at least as much attention to your own heart as you do to what those in leadership at your chosen church may be doing wrongly. The elements of the service are chiefly their concern; your heart is chiefly your concern.