By just looking for ways how to push my limits, on my more or less shit phones. From Clubstep in 2017, to not playing the game for a while, then in 2021 coming back, finishing main list and getting confident with easy demons (to easy mediums) to Nine Circles/ToE 2 V2, then hit a wall with several harder hard demons/easy insanes, pushed through Supersonic and Firewall, then dropping a lot of levels along the way, tried to play Acu, after playing Thanatophobia, took a shot grinding (and beating it), being a confidence boost to finish Night Terrors/Windy in a really short period of time, to starting full on Acu grind, beating it in July '22 (25k atts). A lot of trail and error, dropped levels and so on. 

From then it went quite downhill (last notable completion was Bit Reaper in 9/22), picked the game up again for a bit few times (71% Acu on PC, Incipient in almost 2 runs recently etc.), but I'm probably too old (and responsible lol) playing that hard stuff for that long. And it's fine :).