TGenerally you should be looking at banning based off where you plan on laning and what your hero pool is bad against.

Thats pretty much what I do, or I ban sth people cant deal with. But theres no point in banning if you have to be LUCKY to get it through.

Ive lost 4 games in a row now because people in herald (where i am as a new player) absolutely cant deal with Pudge or Sniper and every game, I tried to ban but couldnt.

Every one of those games, I did just fine in my lane but then a fed player appears who already stomped his lane and its gg for me.

Its already a lot to deal with to have ppl with 5k games being support, picking Luna and intfeed (said guy was lvl 13 vs everyone else lvl20+ when we lost), dealing with those bans should at least be some relieft - in my opinion.