Does it means 'one competition, one unreasonable' or 'one is more unreasonable than the one before'?
Does the word '的' important in sentence like this?
赛 means 'more than / better than'
不讲理的 means 'someone who is unreasonable'
so 一个赛一个不讲理的 means 'those people are unreasonable, and the degree of unreasonable is more and more'