Apple takes huge amounts of cash in exchange for making a search engine their default and they go out of their way to stop users from removing search engines or adding their own. Those apple sanctioned search engines are effectively paid ads, and apple users end up getting sold to those other ad companies with no option to use anyone else as their default.
SeaMonkey would be good if it weren't for modern websites being well, modern websites, and both Mozilla, with their decision to cut SeaMonkey off most of their infrastructure... and later on PaleMoon with its endless barrage of drama and pandering-but-actually-not to the 'uwu windows xp!!11!1! le fruitger aro y2k' crowd... pretty much screwing them over into irrelevance.
w3m hasn't been updated since 2023, and the author hasn't even had any activity on GitHub since July of that year, either, it seems - which given he's had at least 3 contributions a year since 2010 and then just suddenly dropped off the face of the earth, is pretty concerning to say the least.
The last good browser is Lynx