Australia is appalling for this, the average person paying for 24Mbit ADSL2+ gets a messily 7Mbit (and I thought 24Mbit was bad enough!).
But if you want a fast, stable Internet connection, move out into a small country town with a 4G tower (doesn’t need to be NBN). There’s much less congestion. Look around for plans, as most are expensive; I use amaysim’s 50GB/$65/28 days which is about what ADSL2+ would be in the country. Living in Stawell (a few thousand people) I get 20–25/12Mbps with greater reliability than I ever got on ADSL2+. I shall be moving to Navarre soon (~100 people) and get 45/15Mbps there.
Another issue in small towns is that the moment a new tower needs to go up, there may be a low of community pushback (radiation! kids!). It's much better if the current one gets an upgrade.
Then there are cases like this: https://wangarattachronicle.com.au/2017/08/30/solar-flare-up...