One possible way to consider how a combination of bad luck and/or poor finishing ability has affected a football team’s results is to consider the Xg statistics and how they differ from actual goals scored.
The table below shows goals and xG stats for Stephen Kenny’s Rep. of Ireland since the England friendly. These would indicate that Kenny has only suffered bad luck in two matches - Luxembourg and Wales. For both of these matches Ireland had a negative goal difference (lost the match) but had a positive Xg difference.
Although Ireland scored late to earn a point against Azerbaijan, the positive xG difference was 1.3, so there is a case of bad luck/bad finishing here too. For some matches we were quite lucky - for example the draw against Hungary. We were also lucky to score four against Andorra given the chances created.
So, some recent results may be down to bad luck. I think bad finishing and often some needless shots from outside the box can explain some of the stats too.