I don't know much about the former 2 sites but the latter (Mario Robles) is legit. When he was talking about WB being close to giving Cavill his solo Superman film he wasn't wrong, but it was at that point that the negotiations broke down and the whole thing became messy and public.
I blame Cavill's wooden acting on Snyder's garbage ideas and direction and those god awful scripts that Goyer and Terrio wrote. For the love of god MOS was 2hr and 13 min long and the film had a grand total of 5 mins (maybe less) of levity and then there is that abomination people call BvS, Cavill had something like 40 lines, one of which was "no one stays good in this world anymore". How is Cavill supposed to deliver when his Superman (who is supposed to be the symbol of hope) is delivering such garbage nihilistic statements like that, not to mention that all the parts where he played a journalist CK were cut to set up a JL movie.
I watched all 4 seasons of the Tutors and Cavill went from strength to strength not to mention his 2 hr long James Bond audition aka. Man from UNCLE where he was allowed to exhibit a modicum of personality.
I said it before and will continue to repeat it, Cavill is not out, he's gonna be Superman for a long time and he will get his solo(s) sooner than you all think. I am more than happy to eat crow if I turn out to be wrong and have you all remind me of it as long as you naysayers are willing to do the same.