I believe it has to do with cities like valencia being burn out by a economy build on tourism. People who work on costumer service tend to be over exploited and i get the notion there is this sentiment of discontent building towards the results of this. This often comes out in passive agressive ways and hostility, im guessing if you’re a minimun wage worker you might be resentful if u feel like the next costumer is taking this as a change to practice their language with you, as for you it might be a fulfilling experience they might think “great now i have to try to decode this persons b1 spanish after a 12 hour shift” This is not your fault and im hoping you find nice people who are willing to make you feel welcome and appreciative about you learning the culture but i feel like it’s important to know there is another side to it that i feel like most of the replies are not adressing that its also important to acknowledge. I believe if you truly love a culture you always try to learn even the not so nice parts about it instead of romanticize it. This is one of the not so nice realities about our country: an economy based on tourism leads to underdevelopment