I find "uBlock Origin"[0] very effective ad-blocker (in some cases it can decrease page load by more than half)

Opera, of Firefox with "uBlock Origin" would be a very good choice for phone browsing

Endless OS [1], a free debian based disrto that comes preloaded with so much things, actually their focus/mission is to target situations pretty much like the one you described

[0] https://chrome.google.com/webstore/detail/ublock-origin/cjpa...

[1] https://endlessos.com/