Rawdogging the internet applies to those who do not set up their phones properly. This applies to both IPhone and Android users. It is uncool that Apple only allows Webkit based browsers, where uBlock Origin doesn’t work. But even Safari Browser can be set up properly in the settings. Additional to that, there are extensions that block ads and trackers. I use a combinatiion of three extensions and I haven’t seen any ads so far:

KaBlock!
Hush Nag Blocker
Ad Guard (I only use the free tier)

This is and was the current workaround. On my old phone I had to install an app for that because they decided that there is an up and down which didn’t allow for a 180° rotation.

When held upside down the buttons on the side are misaligned to where the fingers and the thumb are placed. Thus, the volume up-and-down buttons are swapped, which is rather unintuitive.

Before a smartphone holder for my car was handed down to me (I never bothered to buy one for myself) I placed my phone inside the cup holder located at where the shifter is. When the phone needed to be charged, it was not possible to have the phone oriented in the “normal” direction, as the phone would have stood on the charging cable resulting in damaging of the cable. For that reason I made use of the app that allowed me to rotate the phone, so that the charging port would have been on the upper side.

A phone with the charging port on the upper side instead of the bottom. This makes using the phone easier when it is being charged. Also, recessed camera lenses. Why do they have to stick out? When placing the phone on a surface, the camera lens cover will get scratches over time. If the phone was just one milimeter thicker, the cameras on the back wouldn’t stick out and one wouldn’t need a phone case, that adds to thickness anyway. It also would be nice if phone manufacturors would still have smaller screen sizes (max. 6") in their portfolio, as it is inconvenient to carry a larger phone in a pocket.

Apples eco system does have pretty good safety features. As far as I have heard, Apple is indeed not up to sell user data outside their eco system. However, they collect data from their users and use it for their own purposes. It is always a good advice to go through each setting (of phone as well as laptop) and evaluate if it is needed for functionality (e.g. location services or access for the camera or contacts). Not only will this measurement reduce the amount of (usually) unneccessary data that is being transmitted otherwise, but it will also improve battery life as well.

Do you mean iCloud Mail? I assume it is as secure as all the other iCloud services themselves. Personally, I don’t use iCloud (except for the “Find my” feature). But you can set up any third party Email service with the Apple’s Mail app. I use Mailbox.org as email provider and have it set up with the Mail app on my iPhone. It works flawlessly. Third party email providers often come with additional costs (the lowest tier with Mailbox.org was 12 € each year when I switched from a freemail provider a couple of years ago). I don’t know if iCloud Mail is free of charge, other than additional storage space.

Try cobalt.tools. It does what you want to do inside a browser tab (although I only used it on desktop so far), but it might work with an IPhone as well. You can convert YouTube links into either mp3, ogg, wave and opus files (with various bitrates), or mp4 or webm video files (with various resulutions). I use it constantly.