you can always join the server and ask stuff, if the guide isn't enough
Hello!! I played the game from the start and follow the neutral route using the guide. I'm already at the part where Thane and the MC need to sabotage each of the chief's plan. The part about the bomb and rouge lizards? So i want to compute if I'm going to get the neutral route or not but I don't understand these indications." >= " " =< " " > " " <" Could you please explain them to me by each column? 
for the THIRD time, getting the neutral/good ending of the war is possibile regardless of the choices, just visit thane before going with the chief's plan at the very end and buy that emblem in the demon city's auction, then visit the painting at the bull temple.
The choices and their consequences are listed in that tab you sent. < and > are those symbols used in simple algebra to say "less" and "more", <= and >= are "less or equal" or "more or equal". so, for the lizards being hanged, for example, if Axel's suspicion points are less or equal to 3, you can save them.
Of course, you can't save everyone and get every "husband" and their scenes in one playthrough, it's part of the reason there are multiple routes.
you misunderstood, it has never been possible. some made the points 3 and 3 to save both the spy and the hanged lizard, but lose nauxus as dateable in neutral like that, or do something else by killing the spy.
really, if you go neutral, you can have thane and nauxus too, if he liked you more than axel, while axel is locked in the bull route regardless.