Scott Weiland -- Stone Temple Pilots BETRAYED Me

Scott Weiland says he wants millions of dollars as a fabulous parting gift from the lackeys in Stone Temple Pilots who conspired to boot him from the group.

TMZ broke the story ... STP sued Weiland, claiming he sabotaged its 20th anniversary tour by being chronically late for performances, missing promotional gigs and improperly using STP's name to promote his solo career.

Weiland has now filed a countersuit, accusing the 3 other members of secretly plotting his ouster. Weiland says it's particularly galling, rhetorically asking, "How do you expel a man from the band that he started, named, sang lead on every song, wrote the lyrics, and was the face of for twenty years?"

Weiland now wants to thwart the efforts of the remaining members to grab the STP name, asking that a judge formally dissolve the band partnership.

Weiland also wants a minimum of $7 mil in damages.