So you agree chasidim have a “age gap” albeit smaller but no crises. According to your numbers at 4% increase pr year even if 19 year olds are marrying 18 year olds, that should leave 4% of chassidish girls unmarried.
No, because statistics show that there are actually more boys born than girls.
In your opinion/experience at which stage is the biggest problem.
None of the above. You said not to skip a step, but that’s what you’ve done. The first step is actually for young men and women to enter into shidduchim, and since they do so in uneven numbers, the rest of the process is skewed.