I see no problems with this deck and beat it many times with my Blue eyes deck, except when the opponent summoned some monster and started to banish my cards twice a turn (during my phase and his). I do not know what to do after that.
Yeah that's the problem with this deck. Unless the person playing it gets the ideal hand it's very likely that they'll lose. Since you'll need revnents and hound on the field in order to deal with backrow and creatures. Add in core if you don't want it getting clashed and that means you'll need 3 monsters on the field with origins if you want to make a play.
I don't agree. It is not that difficult to summon Vendread ritual monster using either Houndhorde or Revenants. The key is that you can discard all the rituals mosnters to the graveyard (and still summon them later) to add cards you want to the hand. Yeah, still it sometimes bricks if you get 3x Slayer and 2x Battlelord in the starting hand, but hey which deck doesn't brick from time to time.
You just usually have to chose between banishing monsters and backrow removal (whether to use revenants or houndhorde) but you decide based on the deck you face and you're fine
For example you can discard Houndhorde with Vendread Nights and search Revenants from the deck, then special summon Houndhorde from the graveyard by discarding Slayer and normall summon Revenants. Then you ritual summon Slayer using both Revenants and Houndhorde. All in one turn