Celebrim
Legend
Our group just played the final session in a somewhat lengthy campaign last night, and I was kind of disappointed with the way it ended. By the end, my character was a Warblade 17/Barbarian 1/Frenzied Berserker 7 with Robillar's Gambit...
Player chooses famously broken over powered character building options...
Is disappointed when campaign lacks challenge and finishes in an anticlimactic way.
What I hadn't really realized until earlier that night was the fact that, unless I was bereft of any uses of the Frenzy ability, not only was I essentially invincible in melee combat...
Yes.
Don't blame the yourself (entirely). It's the DM's responsibility to exclude material which produces this situation or anything remotely like it. I don't ban virtually everything WotC published in 3.X because I hate my players and I'm sadistic. I'm not saying 'No' to disempower them. Quite the opposite in every way.
Seriously, you've reached the end of the ark of power gaming, as almost every serious power gamer does. Congratulations on your new maturity as a gamer. You've realized that winning isn't everything.