Bionic Commando Ending

SpoilersI just beat Bionic Commando and overall the game was pretty good. However the ending snuck up on me a little. I thought there was going to be this final boss fight with Super Joe, but fighting Groder was the closest I get to a final boss fight, and he wasn't even that hard. So I get to watch Spencer myself repeatedly headbutt him to end the game. The game was great and I liked it a lot and the ending was good as well I just like endings to be a little bit more challenging than the rest of the game to give me that sense of satisfaction. Hopefully the sequel will clear up things like what happened to Spencer and his wife and a follow up on that Morse code transmition (search it if you wanna know what it means cause I forgot).