The adjectives tedious, difficult and boring are negative, passive and non-motivating. Do you associate these adjectives with subjects in which you have poor knowledge, bad experiences or lousy grades? And do you find subjects that you know well and in which you have good experiences to be exciting and interesting?
if, instead of labelling something as “boring” or “difficult”, you decide to adopt a more favourable attitude towards the subject, most likely you will then start to understand it better than you think, with the result that boring transforms into interesting and difficult into challenging.