Are all poker sites the same ?

It takes an enormous amount of faith or total crazyness to believe that poker sites are honest  , and or true  !   Are all sites similar to betfair or do people find others just the same .....  Do the cards flop the same as in real play poker ? , random ..   .... Poker must be mostly luck when played  ! or total bluff ! Because in my expierience  the odds never seem to stack up with on line poker . ...  just an opinion ....