The losers had been trying to take down Pennywise. It's just too bad that pennywise made that physically impossible for them to do. The Losers all got shrunk down, about the size of a toy and will easily fit in the palm of your hand. This size change led to them not being able to do the things that they used to do. That's how you got to where you are now. Babysitting tiny Eddie, who was upset because he was still the shortest one.