Why players say that traxler countergambit is no good?

Doesn't matter much - the fact that you gave up your right to castle makes moving your king to the queenside a lot harder.

it is not good anymore because u will sac tons of pieces and oponent can capitalised in the end game. . you can play it in club stage but after this it appears rarely as a fashion. 

Ke7 to d8

Nxh1 is incorrect

because it is objectively not good

I'll play the Polerio Variation. No more Traxler. Only in Blitz games

Black have a rook on a semi-open file

Looks equal...

@Trexxler3241 last time i used it in a tournament i lost without any chances playing the traxxler as black, sure maybe i was unlucky that my opponent was well prepared as he played the traxxler himself, but he showed me that the traxxler is not equal, and just good for white

fwiw my recent (2017-18) score on the Black side of the Traxler in online slowplay games is P13 W10 D3 L0

If I remember correctly, when I studied the theory on that line, Rf8 was avoided due to Nc3 effectively refuting the entire line for black.  I'm curious on what your thoughts are that overturns that assessment.  Remember that black is still down a pawn and needs positional compensation.

Instead of Rf8, 1...Bg4 2.Nf3 Nd4 3.Nbd2 Qh5 followed by 4...Raf8 loading up on the weak f3 square is enough for equality.  White has more challenging plans than 7.0-0 though in my opinion such as the 7.d3; 8.Be3 plan.

Yeah! But I quit this opening because it is too risky after I lost to a club player in an over the board tournament. If I only know the reply, I may succeed. But still, Bxf7+ is good, although white must be careful not to lose.