at low ranks
You got bitten but that Altair Thousand Alts character (whatever the main one is called) and caught the infection? 
You would do really well to drop that attitude — would be good for your own self, first and foremost.
Oh, come on. Apart from the aforementioned bit, do you really believe or suggest that intelligence, maturity, skill or whatnot correlates with something as trifling and inconsequential as the rank in HS? See also, for example, the beginning of this post and further links, I don’t feel the need to elaborate on all that again.
That’s more or less it, I guess, but I suppose I could add another bit. Don’t really wanna play a forum telepath or a typical " ‘you’ problem" forum moron, but let’s just consider a possibility: could it be that you’re upset about your current rank (not something I’d recommend, as explained above, but nevertheless) and thus perceive innocuous or mundane game actions as ‘BM’? ‘My greetings.’ — sure, that’s so offensive. 
Just something to think about.
That’s just a stellar suggestion.
If you’ve got issues with your spouse, just have fun with your other spouse.
Problems at work — just focus on your other job.
Troubles in life — enjoy your other life.
That’s it.
Yeah, yeah, the ‘What were you wearing?’ kind of speak…
That’d already be enough to disqualify or refute your post, but there’s more — even the factual part is lacking:
And how exactly have you determined that, based on what data? Especially given that:
Is it just a wild theory or guess that you pulled out of… somewhere and presented as a supposed truth, then?
By the way, I ‘BM’ a lot and don’t even try to deny it. 
In my view, that’s a highly subjective concept in the first place, as mentioned above, and I could hardly accept a definition that’s based only on someone’s fragile and irritable ego.
For example, you’re playing a deck I don’t like (or perhaps, more seriously, a deck that is bad at winning, but excels in stalling and annoying the opponent, e.g. all those leech DKs; UPD: whoops, my deja vu kind of feeling that I was repeating myself yet again was justified, of course), for example some Rogue, are you’re gonna say you’re not ‘BM’-ing me? You spam the same card 20 times per turn and think it’s not ‘BM’, but get upset if I say ‘Hello’ to it? You draw your entire deck and start dying to fatigue, only to have barely scratched my hero’s armour and have achieved nothing, and that’s not trolling, but you get upset if I say, ‘That’s incredible.’? I could go on. Or, more importantly, you concede with the purpose of griefing the opponent and denying his progress on a quest like ‘Deal 200 damage to the enemy hero’ (might be repeating myself yet again, but I don’t rightly remember or dunno of that topic has stayed on the forums; found something like this, but it’s not most directly related), but start crying if someone gets on with it, for example when there’s a ‘lethal’ on the board, instead of placating the big baby that you are and your hurt feelings? I say, away with your ridiculous notions! And I don’t mean to be too blunt, but I really don’t care what you think or feel in this case.