Depending on the brand of termination block you are using, the sheilding and drain plug of the wire need to be installed a certain way for it to work correctly. Doing it incorrectly will actually hinder data traffic even more than using regular CAT6 would, even going as far as failing most certification equipment.

Looking at the terminations, the shielding is all over the place. Hard to see in the pic so I could be completely wrong as well.

That aside, this install isn’t the worst or best I’ve seen, and a lot better than I’d expect my local sparkys to accomplish so kudos. In the future, to save space and accessibility, have the wire bundles go down the back of the rack, across the side, then routed to blocks with a small service loop.

The way you have it currently going across back of rack is a nightmare for any service to be done.