Yes and no.
Definitely there have been places and times where people opposed to nuclear energy have filed lawsuits against nuclear power plant construction.
On the other hand many times the trouble is between the constructing company, the electric company and maybe regulators and it usually is in the form of a lawsuit because this is how you decide who owes who money in the end.
The lack of predictability comes from lawsuits, not technical problems in construction. Plants that were completed and ready to go online on schedule were stopped at the last minute by lawsuits, and in many cases were never started up.