It can be the most frustrating thing when the internet is unreliable and slow. You think you are online but in reality, you aren't. If you are a developer then there are a few tools that can help with the pain.
If you are using SSH on slow internet it is a terrible experience because SSH wants to confirm every keypress with the server first before you are allowed to type the next character. The tool MOSH helps with that, it allows you to type ahead and will underline the words that have yet not been confirmed so you will know. The way it works is that it sets up MOSH server at the remote and then simulates the SSH connection. It also allows connections to be broken which is not allowed with SSH!
Websites have gotten increasingly larger even though some places internet has not gotten faster, solutions like the AMP Project (https://ampproject.org/) has helped on the problem, but it is still not uncommon to download 1 MB for a single page. That can take forever on a 3G connection!
The solution is a CLI browser called Elinks, it is a text browser that you can run on a remote server and then use MOSH to ssh into, it will transfer the minimal information for you to browse a page and it is fantastic!
Bitbar is a Mac menu tool that allows you to run and show the output of bash programs. This is useful because even if you are connected to WIFI it does not mean that you have a reliable connection and there is no way to detect connection loss. Bitbar is fantastic because if you notice your connection is slow you can look at the menu bar to see whether you lost connection or the connection is just slow big difference!
If elinks gives you problems or you want a little more familiar browser experience then brow.sh is a really awesome solution, it basicly renders a webpage and sends you a screenshot based on text characters.
It can be super annoying download and uploading files on unreliable internet because the connection is dropped and you have to start over up/downloading the same data again.
You can use tools like IPFS that are built to retry and break large files into small pieces that can easily be transfered.
IPFS is better than webtorrent because it is able to share pieces across files where torrent will always encode a file again and share it even if it is the same in another torrent.
RSYNC is good but is a active program that runs in the foreground, where IPFS and Webtorrent is made to work in daemon mode which means in run in the background.