I’m 26 years old and just had to buy a bottle of aspercreme because my job has ruined my knees. i feel like I’m living in hell

I work at a chain coffee shop that takes advantage of their workers. Keep complaining about knee pain and all the old women that overhear me kept recommending aspercreme. It's working! But I feel like a 26 year old shouldn't have knee problems from their job 🙁