Despite making a thread on it and posting about it in another one... That's the whole point! No matter how many times you make a post about it, it was done for this reason. Matt had to fall and fail and he did so by his choices. Asking to change how a show was written to make it so your lead character can have everything go well/according to plan and lack any conflict makes for a boring show. It's also lazy writing as the character needs conflict to go somewhere.
Matt did ALL of this stuff because he thought it'd protect the people he loved. And after making that decision, the people he loved suffered the most and left him. Elektra died, Foggy quit and left the law firm, and Karen was completely over him with how he left her and Foggy on the Punisher case. This all lead to his big reveal to her that he was Daredevil.
Season 2 lost its footing in the back half, I think, because it became more about setting up two spinoffs than about a standalone story. Matts integrity went out the window, Foggy got left on the sidelines, etc.
I find season 1 so much more satisfying than season 2, partly because of the happy ending of the main plot, with Fisk being captured and jailed, but also because it gives Matt a nice character arc: he refuses to do things Sticks way, he keeps his friends close, and he learns to be more open with the people he cares about. But then season 2 takes all that character development away, and makes him re-learn the same lessons all over again.
The plot of the season didn't require Matts personal life to be destroyed, because a lot of the plot is essentially Matt reacting to the choices made by characters that arent connected to all the personal drama, like Frank, Fisk, Nobu, and Reyes. Matt reacts to things initiated by other people, things that still would have happened even if Matt had spent the season being honest with Foggy and Karen about what he was doing, and keeping Elektra at arms length. Some of the details would be different, of course, but the main storyline could play out in much the same way.
Frank and Elektra are good foils for Matt, who can make him question his moral code, with Elektra also having the personal connection to Matt's past. I know they wanted to go dark, but Matts failures as Daredevil should have been enough. Season 2 could still end with Frank Castle escaped, Fisk bent on revenge, the Hand still active, Elektra dead and Matt feeling guilty and futile, and Matt giving up Daredevil, without having to lose Karen and Foggy on top of it.
Basically, I'd have liked season 2 even more if it played out without destroying Matts personal life, by having Matt be honest with Foggy and Karen (which would also mean having Matt tell Karen that hes Daredevil early in the season, preferably on their first date), not let himself be so easily manipulated by Elektra, and also featuring more Father Lantom to talk some sense into Matt.