Ignite is very weak early game... or just terrible?

I'm playing crossbow mercenary at lvl 30 currently, and I need to say how is ignite supposed to be any good? Oil grenades? Because right now I have ailment chance and elemental damage in passive tree, and ignite is FAR weaker than using skills that freeze and shock. It's really terrible comparatively, just damage wise. Not even talking about the crowd control, which makes it 7 fold better. As a casual player, I want to be able to use different damage types in different situation, and I think that's exactly what GGG is going for with PoE2. But I don't want to use incendiary shot, rapid fire, or explosive shot... I save time with Galvanic shards & glacial shot + fragmentation.