I think it was the dialogue above everything, it was just a pale copy of what we'd heard in LS. Things like "Muhammad I'm Hard Bruce Lee" is that honestly funny? For me it was a case of fool me once Guy... but not twice.
Loved Lock, Stock but thought Snatch was appallingly bad - as someone else said: 'Why did Ritchie bother making an unoriginal, second rate parody of his own film (Lock, Stock)?'