Apart from the possible health concerns of eating lots of collagen of unknown provenance (who knows what chemical procedures were used to extract it from animal tissue?), it is a very unusual protein.

About 75% of its constituent amino acids are glycine, proline, hydroxyproline, alanine and glutamate. These are all "non-essential" amino acids, which means that they can be made in the body from non-protein dietary sources.

Collagen is very low in the essential amino acids (phenylalanine, valine, threonine, tryptophan, methionine, leucine, isoleucine, lysine, and histidine). The essential amino acids can not be made from non-protein dietary sources.

Getting 30% of daily protein from highly-processed collagen does not look like a good plan to me.