Like you I've had the same experience, then I started using an app recently called chronometer [1], you type in what you eat and it tells you how much of the RDI of vitamins you get. There were a lot I was missing out on I found, also, at the same time I was trying to move to a Mediterranean diet.
A diet of a lot more plants like the Mediterranean diet meant I met all my RDI's, whereas a normal meat and 3 veg, cereal for breakfast western diet didn't - things like vitamin E and so on were a lot easier to get with the Mediterranean diet, though for things like Zinc I had to start eating nuts and so on - something I'd never done much.
It surprised me that the things that seem to stop cancer (according to some studies) were exactly the same things that are more prevalent in the Mediterranean diet, it became a bit of a no brainer. Give it a go (I'm just a happy customer - its free any way with a paid tier)
A diet of a lot more plants like the Mediterranean diet meant I met all my RDI's, whereas a normal meat and 3 veg, cereal for breakfast western diet didn't - things like vitamin E and so on were a lot easier to get with the Mediterranean diet, though for things like Zinc I had to start eating nuts and so on - something I'd never done much.
It surprised me that the things that seem to stop cancer (according to some studies) were exactly the same things that are more prevalent in the Mediterranean diet, it became a bit of a no brainer. Give it a go (I'm just a happy customer - its free any way with a paid tier)
[1] https://cronometer.com