100 years ago our infrastructure was second to none in the world. Railways, trams, canals, harbours, lighthouses, public buildings, legal system etc.
I showed you figures of tonnage of food imported versus the smaller amount exported during the famine. Did you know there was starvation outside Ireland too? History is not as black and white as you were taught.
Now try looking at those figures again.....
While we're at it, you might also want to educate yourself about the corn laws, and how British trade policies affected Ireland......