I thought I was losing my mind, but take a look in this forum. There are multiple other posts about people getting tired of the increasingly unreliable, glitchy, inconsistent nature of MFP.
I just entered a new custom food and saved it - It's now not there.
Yesterday I had to uninstall the app because it simply refused to sync my data, and when I tried to log out and back in, I could no longer log in. Reinstalling didn't work.
The day before that, all foods were displaying the same incorrect nutrition information.
Look, I'm a dev. I get it. Bugs happen and users manage to do things that you would never anticipate. But this is not a new app. This is not (or, at least, should not be) a complicated app. The features haven't drastically changed in years and yet there's still things going majorly wrong with them. There's no excuse for the frequency of annoying experiences while using the site/app in the intended manner.
Before some poor 'community manager' type comes and copy-pastes a canned response, save it. Just tell someone who matters that this site needs work. When you annoy your users day in and day out there is always someone out there willing to make a less annoying version and eat your lunch.