tl;dr
What I imagine you said is:
Lost martinfailing yada yada yada butthurt yada yada yada pissed and will make MP look bad yada yada yada... Jesus guy, did you even try to verify the rolls? Do it or gtfo.
LET THE WRATH OF l4r3f4c3 COMMENCE AND MAY THE PWNAGE BE MOST UNMERCIFUL AND RUTHLESS!
Are you like 14y old and hang out on HF all day? You might want to grow some pubic hair first then..
He wasn't martingaling. He was betting at 80% chance (1 in 5 rolls is a loss) he lost more than 1 in 5 so he is claiming shenanigans.
A lot people think that 98% chance can't lose but they forget about that other 2%. Just like 4 out of 5 times you win, doesn't guarantee that you'll actually win 4 out of 5 rolls.
Out of curiosity, what is HF?