I'm not joking at all. The MaleShep voice is extremely "not good".
In fact the male voice is what kept me from getting into the series at first even though the setting is right up my alley.
Luckily after months and months of gathering dust on my shelf I rolled a FemShep on a whim and have been hooked ever since.
My experience with the game in this regard is not unique. I still contend that long time fans cannot hear it because they are used to it. To them it's simply Shepard's voice.
And your idea of him being "not good" is a subjective statment, that is, it's merely your own opinion.
It's simply not possible to rate what is good, better or best on a scale of the Mass Effect series in terms of voice acting Shepard because Meer was the only male, english speaking, voice actor for Shepard. He improved greatly, and many players in ME2 and ME3 found him better than Hale, that is not objectively better, but his voice acting was more satisfying to them as gamers than Hale's was, just as Hale's voice acting is "better" to you than he was.
I personally thought he was a sheer delight, especially in ME3, and the Shepard in my avatar is, to me from playing with that face over three games, the definitive Shepard, but it only applies to myself and no other gamer because it was a unique custom build of Shepard that worked for me.
I simply cannot possibly imagine Shepard with a different Voice, because he became THE Shepard for me over three games.
You can disagree with that assessment, and that is totally fine.
But let's not get bogged down by stating subjective statements as indisputable facts. It's indisputable to you that Meer is not a good voice actor, but the same cannot be said of every single gamer who played as a male Shepard.