I hate drama slumps. Hope you will find something interesting that will keep you engaged!
Children of Nobody - so I read that you enjoy thrillers. That's also one of my favorite genres and Children of Nobody is in my opinion very very underrated. It was one of the dramas that got me out of my slump around 2 years ago. It doesn't live stones unturned and keeps you on your toes, at least for me it worked.
Dr. Romantic - another drama that got me out of a slump. In my case, this became one of my favorites and Dr. Kim my favorite character in the latest years. Amazing medical drama, engaging characters and Dr. Kim...if you give it a try you will most probably see why I fangirl over him so much. I first saw it in 2020...have re-watched it 3 times since then and patiently waiting for the 3rd season atm :))
One Ordinary Day - thriller, short, fantastically written and acted (another one from my drama slump period)
Through the Darkness - another thriller, serial killers, has Kim Nam Gil who is a spectacular actor, also shorter than the average drama so it doesn't drag
The Vigilantes in Masks - I always recommend this for people in a slump and for most of them it works. It didn't age amazingly well though and it has that over the top Chinese special effect sometimes but there is something special about this one. Maybe you could give it a try and see for yourself. The chemistry between the main characters is really good and Wallace Huo is a delight to watch.