You can counter hope with a variety of cards. Here are a few that single-handedly win against hope (or very nearly) in a rol-fractal-hope deck:
-fire buckler
-unupped spine carapace
-thunderstorm
-rain of fire
-pandemonium (2-3 almost guarantee to clear the field or almost completely clear it)
quanta denial+rush. a first or second-turn discord will shut rol-fractal-hope down for 3+ turns, which is plenty of stall for a rush deck, since it will take at least another 2 turns to play fractal and then play hope, and the light quanta will probably get scattered too, so that's another 1-2 turns on top of that before hope can get up. add even just 1 black hole as soon as the opponent gets 8 aether or 7 light quanta (in case of unupped hope) and you have another several turns before your opponent can do anything except maybe play an electrocuter or shards (and then stall himself more by using up quanta).
-devourers (see above - not quite as effective, but nonetheless...)
-plague
-retrovirus
-aflaotoxin
-mass creature-control, examples include multiple flying eagle's eyes, fire nymphs and parasites
-immortal growth creature+healing/stall until he gets up and over hope - takes a lot of time, though
-momentum: my speed rainbow has 1 card that can combat hope - elite charger. However, combined with 3 steals for shards and the electrocuter, web+wings to keep me alive, and basilisk bloods for the dragons, I can stall until that one creature kills my opponent (usually leaving me with 3-5 card left by the time I win).
plenty more cards work well at countering hope, such as any (literally) damage reduction shield (preferably played after getting your opponent to play way too many rays), and some particular decks stand a good chance, such as an exceptionally fast rush (if the opponent is sufficiently slow in getting up hope) or a deck-out deck (some shards/flying staffs/etc. are usually enough).
so stop whining that it's overpowered, there's plenty of counters. Any sort of permanent control will take care of the electrocuter, allowing you to rely on creatures to control the rays.