I asked because I’m not familiar with religious courts and rabbis in the Land of Israel, and ordinarily the rabbi checks the matter ["and I rely on the rabbi"]. So maybe you can tell me which certifications you know are good.

I don’t have information. All the information in this area is biased, and everyone tells horror stories about the others. Any recognized kashrut organization has a presumption of reliability, and even the regular Rabbinate is probably improving. In my opinion, one can eat based on any of the well-known certifications.

Why just any certification? Surely there are some certifications that are really bad, as is well known.

I strongly protest the fraudulent use of my name.
I myself am the Rebbe of Eshkol the Buyer, may he live long, and you have no permission to use my name.
If you want, go start your own Hasidic court with your own name, and leave my dynasty and my ancestral house alone.