Seagal claims van damme is just a ballerina, he did it for flexibility but also has a legit fighting record. Something seagal doesn't have.
Jean-Claude Van Damme competed with the Belgian National Karate Team at age 15, had a competitive record of 44 wins - 4 losses in semi-contact matches, and earned his blackbelt at age 18. He also has a competitive kickboxing record of 19 wins - 1 loss (18 wins by knockout).
The only real accomplishments of Seagal in the world of martial arts is being adept at Akido, which by definition involves the other guy deliberately taking a fall so the other can "apply the technique". In other words basically useless if the other person is actually fighting back.
Steven Seagal incident
In 2008, actor Sylvester Stallone declared to the British magazine FHM that "At a party in my home in Miami in 1997, Van Damme was tired of Steven Seagal claiming he could kick his ass so he offered Seagal outside into my back yard."
According to Stallone, Seagal made his excuses and left while Van Damme tracked him down at a nightclub and challenged him again. Stallone finished by stating "Van Damme was too strong. Seagal wanted none of it."