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So, crumbly brick is always a pain to work with - that is unavoidable in this instance. However, a better powered drill motor, with a much heavier duty hammering action will be easier to use.
I'm assuming that when using your green Bosch, you're having to rag it quite hard to drill your holes, which won't help with the quality of hole you end up with. Instead with a dedicated SDS, you'll use it much more gingerly, and with new bits the whole drilling procedure is likely to go smoother.
I've got a half decent Makita combi drill, but I'd never use it for masonry if I have any kinda of access to an SDS drill.
Still, the job would be easier with a better tool. A dedicated SDS drill will make the whole process quicker and more straightforward.
The bad workmen blame their tools adage is annoying for several reasons: