KotOR is NOT a weak era
Many people have the belief the KotOR era is weak (mainly due to how easily Meetra got beat by a TOR Sith), however this is not the case. All pics taken from Knights of the Old Republic campaign guide.
The Jedi Order of Knights of the Old Republic had large numbers of expert swordsman and force-related powers. More members are also more active and in the battlefield then the likes of the Prequel Trilogy and other eras.
Lightsaber and melee dueling is a frequent practice throughout the galaxy.
Darth Revan's Sith Empire is stated to be an equal to the size and power of Palpatine's own Sith Empire.
In a short amount of time, Darth Revan's Sith Empire was able to control 1/3 of the known galaxy, a very impressive feat. Alongside him were thousands of Dark Jedi.
All factions of the galaxy have been in constant warfare, making many very experienced fighters.