I need to vent about my job in the insurance industry.

I've worked in various roles for five years (Since 2017), including Claims Customer Service and Sales Representative/ CSR. I currently work remotely and my job title is "senior customer service representative" for a well-known insurance company at a local Agency. For the last two years, I've been experiencing burnout and anxiety due to the overwhelming workload. I have a sense of frustration that my boss doesn't seem to be acknowledging the amount of work I'm handling or thinks Im not doing much on my end. Moreover, I feel I'm not receiving the necessary attention and focus when seeking guidance or discussing important matters w/ him. This adds to my already growing emotions, and I am trying to separate my feelings from work, but I am simply that person; I care too much, even when I try not to. : ( I started as the only rep and have been a dedicated worker. And, many agents have come and gone due to the job's pressure. The industry's changes and new rules within the company only make it harder to please customers, especially when it comes to money in this increasing economy. While it's not necessarily my job to please customers, it's a significant part. I'm responsible for handling CSR work, escalated calls, irate clients, sales, and billing issues. My boss often adds more tasks on the spot, increasing my stress levels. We need more people to help, but when we get new team members, they are not as seasoned, can only do so much, or are directed to handle leads which only adds more to everyone's workload. ** Please tell me if I'm overreacting or my feelings are valid. I do want to mention I am 26 years old, and maybe I'm just not used to this workload. I welcome all opinions with kindness. Thank you, my fellow hard-working fairy god bosses.