Obviously if a food gives you a reaction then don't eat it.

I find the texture generally unpleasant

I am in exactly the same boat. I cannot eat onions unless they are finely cut. Onions that are finely cut give out more flavour anyways. It is all about learning how to cut an onions finely and quickly. This is similar to how I do it. I do downward cuts to the centre of the onion. I never do the horizontal cuts that I have seen a lot do. To me that is just asking for trouble. I also cut my slices very finely. I like the bit of leaving the end on the onion. That is a new one to me.