>Best way to win street fights?
I did some research on this.
Any answer you will get is based on marketing. Because there is really no type of job anymore that includes "fighting to survive" which would in the end sort out the bogus claims from the legit one.
So basically, you have the chocie between
>Combat sports with lots of rules that usually fail in the street (lots of examples)
Not to mention that combat sports are usually entertainment, ie. rigged. This includes both the pro circuit (pro boxing is notorious for being fixed, MMA is based on carnie people ponzi schemes, don't get me started on Muay Thai, etc.) and the amateur/Olympic circuit (lots of scandals, Judo medalist beaten up in Rio by a layman, etc.).
>Watered down martial arts that claim to be ancient, yet are maybe 50-100 years old and mostly just LARPing
Even if by sheer luck you manage to enter a legit school, it's really only what Communists (China), post-WW2 Allies (Europe, Japan) or the government (the rest) deem as an acceptable level of self-defense skill.
>Lifting because bigger=stronger
Only suburban Americans think this, so please disregard.
Of all these, only a handful was actually used to a good effect in the battlefields of WW1, WW2 and more modern wars like Korea and Vietnam, and those styles aren't exactly the type you could still find around today.
I could write a lot about the history of all this shit, like the Allies closing and banning the stuff the Nazis did for unarmed or armed close combat (which was apparently pretty fucking awesome because the Nazis beat the Gurkhas, the Greeks and the Japanese in close combat during that time).
In the end, there are only a very few exceptions to this: Meaning military and police systems. Those actually HAVE to work, or your customers are dead. So, I'd research in that direction (it's basically always stand up grappling + pressure points striking). Most of the studies and research on this isn't avilable to civilians.