Did you blow time/money on BJJ classes?
Yes, I trained with Renzo Gracie and Craig Kukuk. I also boxed. Truth be told I was a better boxer than a BJJ guy.
Full contact karate champs were exposed back in the day by Muay Thai fighters. The karate guys were ill prepared for low kicks. They had no defense and didn't kick in the muay thai manner of using their legs as clubs so to speak but snapping from the knee joint. They also punched in combinations while the muay thai generally waited for a power shot opening that rose from their kicks.
Like I said you need a well rounded game today. If you think BJJ is bull shit go to a good dojo and join for a trial month or even a day. I'm sure it will be an eye opener. This is where a guy post on this thread he is undefeatable in the street with his secret eye gouges and ball grabs. I think more arm chair tough guys would be have their egos crushed if they joined a boxing gym or a BBJ dojo. They would spend many sleepless nights after doing so.