Can you use ーられない to express that something is unbearable?


Perhaps ーづらい is more appropriate in this case? For instance:

> _I can't look (because it's unbearable)_  
>  [辛]{つら}くて見られない

Maybe a more natural way to express the above?

> _[it is] unbearable to look at_  
>  見[辛]{づら}い

Without the ーづらい

> _Horror films are so scary I can't watch them_  
>  ホラー映画は怖すぎて観られない




辛くて見られない is okay, but when actually facing with something terrible, people
more commonly say 辛くて見ていられない. You can also just say 見ていられない without 辛くて.
(辛くて)直視できない is also common in writing.

見づらい is not appropriate. It usually means being physically hard to see due to
things like bad writing, low image quality, weak light, etc.

