Not necessarily, since if it's done by someone who doesn't know what he's doing it very possibly can introduce bugs, even game-breaking ones, and even fuck up the mechanics behind the game unbeknownst to the player. Also, unintelligible garbage with a big part of it going out of the visible part of the dialogue box is, well, objectively shit. (dunno if it's the case here, but I'm speaking generally).
I would say that MTL is better than nothing if it is a competently done one, otherwise mostly it's shit; if you don't like it though, you should use on-the-fly machine TL on the Japanese game with the right software(s)