Nothing against DR.
Things are “sluggish” because we’re not focusing on the rules. As the visa bulletin states every month: “Section 202 prescribes that the per-country limit for preference immigrants is set at 7% of the total annual family-sponsored and employment-based preference limits, i.e., 25,620”. This is subsequently spelled out more clearly here: https://travel.state.gov/content/dam/visas/Statistics/Immigrant-Statistics/Web_Annual_Numerical_Limits_FY2024.pdf
In FY 2024, it could even be Philippines. Their PD cutoff dates are far behind other countries including DR.
The point is, once these countries reach the threshold, other countries should be given a fair chance.