God I hate both, mostly Yubel though, as it's pretty obvious that it needs to be hit on the banlist as it's a deck at which you require messing with its timing. Also, lava golem deserves a ban as it deals too much and is used to get rid of boss monsters. Finally, at least for the degenerate decks, parasite infestation should require insects to be used in the deck an no effect damage to the player.
Jeez do you sound like such a winge. Anything else you want to complain about, or will you accept that you are just bad and don't know how to deal with cards like lava golem or yubel TI?
I'd limit yubel but not lava golem
And I don't see any problem with parasite infection, you use your skill slot to get that random advantage in the duel