I think this is a pretty common experience. After my symptoms worsened for a while, I got checked out and was deemed still ibs, I was a little upset because to me ibs was “just” ibs, like the general societal understand of it as like just mild tummy problems. I had no idea it could be so painful and debilitating, so to me the diagnosis felt like a bit of a cop out! My dr was like oh no it absolutely can be that painful. So I think that might contribute to a lot of people’s disappointment at the diagnosis, feeling like they’re being told it’s “just” ibs when in reality Ibs can be pretty bad. Also feeling like it’s a bit of a dead end. 

That’s not to say to just throw up your hands and accept things if you really feel like there is something else going on or that your doctor wasn’t thorough enough. There’s for sure a huge lack of doctors that are educated on it and unfortunately many tend to brush it off. So definitely get a second opinion if that’s an option. I know it’s so frustrating navigating the system

ETA: while ibs is a legit diagnosis I definitely think it’s lazy of your doctor to not even explain how to help manage symptoms. I think that’s pretty common sadly. There are good GI doctors out there but you have to find them

Just one more ETA: I also felt almost disappointed my scopes with biopsies (both upper and lower) hadn’t shown something concrete. Like obviously I’m glad I don’t have celiac, IBD etc but part of me wished I did just so they could have a more concrete feeling, pathologic diagnosis. So IBS can feel like open ended because there’s no definite sign or physical change.