Ireland produced plenty of good. The Irish could have supported themselves without the British demanding the Irish export food instead of eating it.

Ireland being left to fend for themselves, without exporting to Britain, would’ve also solved the problem.

By now, Ireland has a higher GDP per capita than the UK, and has had it for last couple of decades.

I’m not sure being a tax haven for multinationals by giving them sweetheart deals when the intentional loopholes don’t suffice is really indicative of a robust economy.

As long as it serves the local population (and apparently it does), I don't see why it's a wrong thing to. Ireland is not just a paper-holding tax haven; it has huge factories and engineering offices of large and successful corporations, again, employing local folks. I don't see how it might make its economy frail.