Why you only add new bugs instead of fixing the old ones?

I was making a mod in MCreator 1.7.4, I wanted to make a sapling! Chose the model X, just...just awesome! The texture was on the block but the pixels which should probably be transparent - was black! Were's the sense of making mods here? Is it possible? I mean, I don't even can make a sapling! Every version of MCreator gets more and more bugs! Fix them! Please, fix them! I become insane when looking at these pieces!