If I’m no one’s type should I change how I look and my personality? I genuinely believe I’m not going to meet anyone who is super excited about me?

I genuinely believe I’m very subpar and it’s easy to find someone better. No one ever stays. No one ever seems super interested despite my efforts and expressed interest. I’ve tried everything to put myself out there. I fluctuate between being confident in myself and having days where I am not so I’m not sure that’s a factor.
I really don’t know what to change - I’m thin and tall so I’m not overweight. I’m smart and kind. I don’t have any major deficiencies.

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I’m not having sex with anyone too soon or whatever either. I am not doing anything objectively wrong in the courting process like that.
If I’m no one’s type should I change how I look and my personality? I genuinely believe I’m not going to meet anyone who is super excited about me?
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