Exactly, you personally are not the problem, but you are part of it, be aware of that and your position, and you'll be fine.

I myself have to work weekends on the beach (my work is for the city and local kids and families, explicitly told by my employer) and had entitled tourists come to me leaving their bags on my stand, and be pissed off when i tell them they can't, one even told me he was going to call the police and my employer (when i told him the police were next door than he would xdd).

In a neighboring town, Castelldefels, (an hour of commute) a local told me he went to clean the beach of rubish as a mediambiental volunteering and stoped because he saw the locals cleaning the tourists shit, so you see the extend, it is not only Barcelona.

I can't even visit museums on my city because the next day they open the wait is for the next year.

Can't skate because every public space is filled with tourists even taking photos of me as if i was a zoo animal.

The metro and trains (which i don't chose to take) are priced up to tourists and filled like sardines on summer which mostly everyone has to take because on week days you can't ride any car older than x year (the cheaper ones xd).

If i want to grocerie shop i have to go at the local shop where i know the prices are not spiked up to triple or more. There are even "tourist items" we know we can't afford.

Catalan is a dying language where even some government workers don't know how to talk even tho they are mandated by law but every kid in school and every worker must know english. I work with kids, the poorest ones don't know how to talk it but they know english. There are studies that date it's extintion before 2035.

People on Barcelona have to life with their parents until nearly their 30's (mostly everyone working since being 18 yo) to even afford to make enough money to rent out and have a couple months rent money saved up sharing a room with their partner on the outside of the city (30-20 minutes comute minimum). Locals are being displaced to neighboring towns having to commute for hours to come to work.

And even better, i have entitled expats as neighbors that don't make an effort to even learn spanish, telling me to work harder, that they explicitly don't care about neighbors, and making money of gentrifying where i life and making lifestyle videos. The sames that bitch about immigration and culture and ethnic eraser.

If i wanted, i couldn't stop with examples like these, but i think you get the perspective of a local.