Just because there were (and certainly still are) errors in how paleontologists reconstruct dinosaurs, and that they are trigger happy to identify a new species based off some mere fragments does not invalidate the fact that dinosaurs certainly existed.

If the absurd errors regarding the age of the world are overlooked, this website is a useful reference in providing information about the completeness of particular dinosaur species' remains:

https://www.prehistoric-wildlife.com/index.html


For example, here is a tidbit from their page about the Pachycephalosaurus:

Fossil representation: Skull remains.

.....

 Once again one of the most famous dinosaurs of all time is actually‭ ‬represented by some of the most incomplete fossil material.‭ ‬To date Pachycephalosaurus is only represented by skull material‭; ‬the actual appearance of the body so often seen in restorations is actually based upon the common form seen in more complete relatives.‭ ‬Although it may seem strange that a dinosaur genus based upon such few remains should become so popular,‭ ‬there are other very famous genera that are also based upon largely incomplete remains,‭ ‬with Ankylosaurus and Spinosaurus being just two such examples.

https://www.prehistoric-wildlife.com/species/p/pachycephalosaurus.html

For those unfamiliar with this dinosaur, here is an artist's depiction:




Now for comparison, let's use the same site to find out about Albertosaurus, a dinosaur that looked quite similar to the Tyrannosaurus Rex:

Fossil representation: Many individuals are known including a bone bed that contains the remains of twenty-two individuals in the same location.

https://www.prehistoric-wildlife.com/species/a/albertosaurus.html

Also, if you look up specific species' names, after some digging you'll run into some helpful charts that help you better visualize how much or little of a particular dinosaur species has been found.

Thanks for posting...I have taught my children that dinosaurs are most likely fake, but i couldn't find the original evidence for this since i discovered it before all the censorship. I am definitley going to look it over because my oldest son has asked me about this topic.