I don't know how any reasonable person could claim that an average arrival time delay of 64 minutes and a maximum delay of 182 minutes is acceptable. That's the Expert Flyer (and Flightstats) data for DUB to LAX on ET.
Flightstats rates this routing "very poor" based on on-time performance, the worst possible rating (0 stars out of 5). It says,
This flight has an average delay of 69 minutes with a standard deviation of 41.01 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 0% of other flights.
The DUB to IAD/YYZ routes are rated "average" (1.5 stars). The IAD to ADD route is rated "average" (1.7 stars). The LAX to DUB route is rated "good" (4.4 stars). The DUB to ADD route is rated "poor" (1.2 stars). The YYZ to ADD route is rated "average" (2.0 stars).