Star Trek: Why Did Voyager Get Rid Of Kes?

gamerant.com:

Ever since Star Trek first hit the small screen in the 1960s, there have been a plethora of new and exciting iterations into the franchise. Some of these have been more successful than others. For example, the The Original Series has been highly regarded by some, mostly fans who watched it when it was released, but also slated by others for having some pretty wacky plots, and some uncomfortable moments, despite its aim to be diversely groundbreaking. The Next Generation is another that had a large fan base, while programs such Deep Space 9 often divides people, some really enjoying it for it’s grittier look at the problems of the Federation in a time of war, others unable to properly enjoy a standstill story focused on politics.

It is Voyager however, where a lot of fans stand together. Many aren't fond of the program thanks to its boring story telling, dull characters, and mostly nonsensical plot. The first few seasons were the most turbulent, and at the center of it all was poor Kes.

Star Trek: Exploring Worf’s Unusual Relationship With Klingon Culture

Kes was an Ocampa, a race of humanoid beings native to the Delta quadrant, where the USS Voyager was whisked away to by the nefarious caretaker's array. The Ocampans are a race of short-lived beings, with a life expectancy of around eight or nine years. As a result of their quick aging, they develop very quickly, being able to learn and process information at a high level all within the first 6 months. By one year of age, they are considered to be adults. Ocampans are also considered natural telepaths, being able to communicate mentally with their own race and the races of others. In the Star Trek universe, telepathy is something that all beings are capable of; some are not