I recommend getting an RSS reader and funneling everything over there.
[1] https://reederapp.com
[2] https://kill-the-newsletter.com
This doesn't solve all your problems, but it's a much better experience than the default.
If you use Kill the Newsletter, consider donating via Patreon or PayPal:
[3] https://www.patreon.com/leafac/posts
[4] https://www.paypal.com/paypalme/LeandroFacchinetti