About the Lvl.7 “blues”… I didn’t got those… in my case sounded like the level 25 blues… I guess treatment should be the same though. 
Do reviews but no new lessons… first days not so different… but then… those will shrink… and shrink… and eventually you’ll have like 20-30 review per day or even less… and then everything will be 大丈夫 … I promise … I did this for a whole month… and then when new lessons… I paced those more slowly than pre-crisis … until it felt ok again to retake my old speed.
Meanwhile… find something that you enjoy doing in japanese. Picking up a graded readers if you feel those beginners club choices are still too hard (which is totally normal… any native content will blow you at first no matter how much Genki / Tobira lessons you’ve gon trhough)… only reading helps you at getting good at reading… just find material that helps you learn while having a good time… (enything with more than 5 new words per page will be too much).
A similar approach to listening: watch a show (a short one, 30 mins for example). watch it raw or with jp subs… see how much you get… watch it later with english (or your L1) subs…
no whinning (because you don’t understand as much as you want)… in total it’s just an hour of your precious time, and half of it you’l be understanding everything… But the first time you watch an episode, you’ll realize how much you understand (aided with visuals) and progressively see the gap of all that you don’t understand yet.
No rush with this approach… i did a couple of 10-12 episodes shows in about 2-3 months…
extra point for ripping the audio of that show and listening as passive immersion …
Listening constantly something you WANT to listen will be a booster to your listening abilities…
I mixed with something a bit more complicated to kept reusing those shows… sentence mining … but in any case watching and listening constantly was a great help.
After that month … heck … even 2 months of slowing down… and doing other activities… hopefully you’ll see more connection regarding what WK and Anki is teaching you with actual content and fun stuff…
now just keeping doing the same… and remember if you collapse again favor immersion… that will most likely turn you back into doing the other stuff once you feel better.
As for grammar advice… well, no advice , just my experience… I hated Genki… finished the last chapter of Genki 1 … planned on getting the second one … buth loathed that one too. So I kept reading and reviewing new things I bumped into using grammar reference books (Handbook of Japanese Grammar Patterns for learners and teachers … or something similar 
)…
No noticeble harm was done I think by that approach… reviewing grammar on the spot made it more digestable… and improved the taste that textbooks and drilling left me with…
Anyway take everything I said with a grain of salt… basically know that there’re different approaches besides textbooks and SRS apps… and can work well alongside or even on their own if you become too stressed