Dealing with persistent depressive disorder during these strange times

I’m a 37 years old woman. Ever since I was 17, my depression has waxed and waned but never disappeared completely, bringing to the diagnosis of PDD or dysthymia, alongside with general anxiety disorder and panic attacks,
Now. I’m a good patient. 
After a few years of substance abuse and self destructive behavior during my late teens/early 20s, I’ve been trying to do my best here - going to therapy, taking my meds, avoiding drugs and alcohol. I’ve managed to grow out of the panic attacks, luckily, but the GAD and depression lingers. I’ve been examining my life lately as a combo of pre 40s crisis and/or pandemic panic and I noticed to every time there’s a trigger, my functional depression - which includes me living a normal life with family, friends, hobbies and career - breaks loose and escalates into full blown depressive episode.

I’ve been dealing with my current episode for a year now. There has been better days/weeks and worse weeks, and therapy has been somewhat helpful but intense and right now it’s making me feel a lot worse than I did in the first place since we’re taking apart all my crappy ass defence mechanisms, one by one.

So, how do I do it? How can I keep dealing with years long lasting depression that I can never foresee when and for how long its going to strike? I am not suicidal but I’m been wondering about the point of living if it’s keeping on like this. Any older depressed folks that can shed light of living with this shitty diagnosis?