Since you mention always having 0 lessons, am I right to assume that so far you have been doing all your lessons as soon as they come in? You also mention having new reviews at many points throughout the day. And having about 10 day level ups.
Doing all your lessons at once should already enable you to go near full speed (assuming you don’t set your alarm to do critical reviews in the middle of the night).
So I think you are getting either some radicals wrong in review (which would delay the unlocking of kanji, which delays getting to 90% on the level’s kanji), or getting kanji wrong a bunch (especially on the second wave, which delays you getting 90% of kanji to guru within 7 days).
Why not try to pay more attention to your lessons? Take a little more time to get your radicals and kanji correct in reviews? Or make sure you aren’t making silly typos on your kanji and radical reviews?
Also, keep in mind that full speed is not the be all, end all of kanji learning. Make sure that if you go this route, you also don’t compromise your learning and retention. Though some might argue that learning the kanji quick and then diving into reading and consuming native materials is a very valid way of learning as well. Assuming you don’t skirt on grammar studies, I guess.