Everyone has issues. It's a part of being human.
And most people don't need therapy to deal with their issues.
However, when your issues cause you to sabotage a relationship that you want to have, or causes problems with work or family, or causes you to harm yourself or others, you probably need some help working through them.
This, to an extent. Some people are whiny about their problems but don't do anything positive about them (Dora, up until now). Some people have issues that they see hurt their relationships with others, and get help (Faye). Some are overreactive to the point of being just-plain-crazy (Penelope) -- and I don't use that term lightly.
Not all issues are something that need to be professionally dealt with -- they are best dealt with over time, and from life experiences (Marten's perceived "spinelessness", Sven's sharp decrease in manwhoriness).
I would add, due to personal experience, that those who have been actively dealing with their issues for a year or two, including talking about them with friends, and those issues have still not subsided,
get help. Drop the pride and
get some therapy. You can only build so high when the ground is quicksand.
When your brain chemistry is an underlying problem, you can only do so much work on your personality. Work on it anyway, yes, but get help too.
*whew*
Alright, done talking and swinging around the "One-Over-Infinity Earlobe Mace" that is completely and obviously inspired by the UBMEOOD.