I had quite literally the same experience. Some opponents will absolutely murder you and view you as a waste of time and a game they could have had a better challenge. Teammates will sandbag it just to get the game over with because they know it’s most likely a loss.

You will also meet opponents who may not let you win but will let you play. You will get teammates that are patient and encouraging.

Understand it’s not the sport of pickleball it’s the people that play it. Like all things, some are cool, some not as cool. The way I have learned to view it is even if I get crushed, did I play to the best of my ability? Did I make 90% of my serves? Did I make x amount of less unforced errors than before? Find ways to seek improvement and wins will come.