If you search the forum you'll find another member said something similar to yourself after having a dreadful time on his first session on Thunderstruck2 at wintingo. He was convinced the game played far worse there than anywhere else he had ever tried it. After kicking up quite a fuss on here about it he went back to play again a few days later hoping to gather some data to support his theory and ended up cashing out several times the sum of both of his deposits and then some
I joined Wintingo last weekend and it was actually the first casino I have managed a withdrawal at in quite a few weeks ! Mainly playing slots and a little video poker - I did get thoroughly hammered when I tried to play their blackjack but no doubt just bad luck.
I've no doubt they are a fair casino, but I would say, the games do seem to have a different 'feel' when presented in their format (possibly, the "quickfire" (?) package), compared with MGS only casino's.
In the video poker there is 100% a definite lag when you have a losing hand, or losing doubling round - IE, when you click draw or choose a card when doubling, the display will start to update instantly if you have won, or lag for half a second before turning over the cards if you have lost - that one thing makes me not like playing VP there too much because you always know whether you have won or lost before you see the cards...
Thumbs up for Wintingo on the whole though and sorry to hear you had bad luck !