Posting a picture would help , but i would gather it is more of a adjustment issue rather than a swingarm issue , unless you hit a car or the bike dropped over a cliff , it's fairly hard to bend a swingarm with any type of "normal" riding
I would measure the chain block adjusters and count the notches , they should be equal side to side , the bolt should be extended equally side to side....that would be my guess as to the crooked wheel , not sure who is doing the maintenance , you or a shop , but whomever it was most likely adjusted too much on one side .....it happens ....
