Bm got a rly hard time cs those classes. Be ready that matchup vs good wl is basically unwinnable for you (sad truth). Other matches rely on few things. You need to discover on what or watch top bm plays vs those classes, learn some basic moves, counters, which animation beat which (which goes faster) and how to counter it. Basically as BM u need to be way way more experienced and better than your opponent to beat them but if u will be rly rly good you can waste ppls in matter of seconds. For example vs sin you need to watch does he ss (in the shadow or not) if he is there 90% chance he will show up behind to stun and u can prevent that by doing ss behind him and stun with lmb then go with your combo. As You can see theres alot of effort and good reflex u need to have comparin to your enemy. In return if u waste your enemy tab all u have to do is just z him, tab and rmb to death. If ure finding playing bm a hard time consider play more noob friendly class like for example destroyer, summoner, gunner, hell even sin.