There’s really no reason at all to bash the OU.
They’re the leaders in kashrus, truthfully, and invest heavily in research and training. Their internship program for mashgichim is incredibly huge and I have the materials binder from it, which is full of information on all sorts of stuff. Star K is excellent, as well, in this department.
In the NYC area for food service, I trust OU far more than the Kof K, Vaad of Queens, and many heimishe hechsherim because they require shomer shabbos ownership PLUS a mashgiach temidi, they check vegetables thoroughly using a shmattah bedikah, they require separate kelim for fish in meat establishments (not required al pi halacha, but a good policy), and have all of their policies written out in a way that’s very mesudar. The Vaad of 5 Towns is also highly recommended in the NYC area.