The worst for me was the episode where Tom Paris breaks the trans warp threshold and becomes an omnipresent God and starts evolving 1000 years a minute.

Janeway realizes it and says- this will change our very existence. Wow! but instead of exploring this they turn him and Janeway into giant lizards then in the last few minutes the doctor just magically changes then back- The end.

WTF, such a waste. There must have been a writers strike that year.