Yeah every single cut here will fill your mouth with red onion gas like a WW1 trench fight. The bottom right is possibly acceptable depending on what it’s going in. Top left could work in some salsas. Rest are just “chunks of onion.”
Some people love it, but if you want to turn a first-timer away from fresh red onions for life, give them large ass chunks that overwhelm the rest of the dish.
I’ve been reading Bonhoeffer recently. His work is very much relevant right now, and quite depressing.