How to limit amount of email on iPhone

Like many iPhone users, I run into storage issues on a regular basis. I thought by upgrading my iCloud storage that would solve the problem but, for some reason, I am not able to access some of that extra storage. But, that's another post in itself.

I searched online to find out ways to reduce data usage and apparently there used to be an option in the iPhone's mail settings that allowed a user to limit the amount of emails displayed in any given account. However, I cannot find that option... was it removed in a recent update... and, if so, WHY? Is there any other way to limit the emails displayed/stored on the iPhone? I have 5 accounts and, between them, they are eating up a huge portion of my storage. I can't have music and I can't take new photos. Very frustrating.

I have been a diehard Apple user since the beginning but the last couple of years I have grown increasingly frustrated with Apple products. It seems like they're making things harder on users, rather than easier. I loved iPhoto - then they ditched it for the oversimplified Photos, which I think is much less user friendly. Now, if this email limit option has been deleted, that's yet another stupid move that will make things harder for us. Are they trying to lose customers? I just don't get it.