"no wonder more and more scientists have trouble with evolution".
They have been saying this for decades and decades. They wish that evolution would finally be rejected but it isn't happening.
However, taken all by itself, out of context I can make a case that the above statement is true!
More and more scientists are interested in evolutionary processes and effects. So more and more scientists are studying it for one reason or another (even aircraft designers now).
Evolution is a very complex phenomena. We do not have all the details sorted out and explained. So almost all scientists involved have "trouble" with it. In fact if they did not have "trouble" there would be nothing to do research on.
However, the "trouble" is in the myriad details of how things have unfolded and tiny issues in the application of the theory (e.g., what is needed for speciation to occur, is there selection at the gene, individual, species or ecosystem level and so on). The "trouble" is
not with the overall expression of the theory and certainly
not with the fact that life on earth has evolved generally as described.
Edited by NosyNed, : No reason given.