This quote was made for people like you - "A bad workman always blames his tools" (Source)

Will just stop the blame games and just accept you were unlucky and lost. If you don't like how the casino works, then completely avoid gambling.

I'm not sure what you mean by not being able to check the seed. You can see your revealed seed as well as the hash of your unrevealed seed at https://bustadice.com/play/seed. In addition the seed is shown on each of your wagers' pages once you have revealed the seed used for that wager.

Hopefully this is obvious, but there is no betting strategy that is guaranteed to win. bustadice has a house edge of 1%, so any bet or sequence of bets expects to lose 1% of what you wager. You were not scammed merely because you lost at a casino. Also, consider that rolling below 1.08x five times in a row is not as unlikely as you might believe. The probability of seeing such a streak in 10,000 bets is 4%, in 100,000 bets it is already 33% and 1,000,000 bets have a 98% probability of seeing such a streak.

bustadice proves its fairness using cryptography and math, so if you have any doubts you can verify that you lost fairly. Simply go to https://bustadice.github.io/verifier/ and follow the instructions. For what it's worth this tool's source code is public. You can view it by simply inspecting the page's source code in your browser or at https://github.com/bustadice/verifier/blob/gh-pages/index.html.

I known bustadice since my first days on this forum in 2017 and then signature was active here and it lasted for a long before it was stopped am sure within that period, butadice would have to build a strong community base that could sustain its traffic need to generate the needed revenue for the site but the bad side is, they have stopped being active here since their signature was closed here.

If its not restricted then why its a bad move on that part? Just appreciate that you do able to access it.  

Second, even if you do set out 1.08 or less it wont guarantee out that you would make guaranteed profits.You could bust out on 1x .

I do understand the rage and bitterness of this comment just because you do lost 500euros which i would say a
normal reaction or blaming thing on the site where they are playing.