Mefisto:
I feel your pain!
NO self esteem---I have NEVER liked my looks...my body....see, I tried also, for ages, to build muscles (Google Greg Valentino, Ronnie Coleman, Phil Heath--these are guys I want to look like) BUT--I never could get there

I worked out over four years, had a trainer, took supplements, ate/slept right--even did 2 cycles of steroids--bad mistake!! And you know what? I always compare myself to other men...it does not have to be the 3 I mentioned above..just any male..and I say to myself..."If only I had their this or that features...... THIS is the primary reason why I attempted suicide...twice...(last one was close...) I loathe myself. I feel so inadequate, insecure, and inferior…..:-(
Also...my hair...it is thinning (I just turned 47..so I am older than yourself) tried all the "stuff" Rogaine, Peopecia, etc....to no avail.....I will not do a transplant as I have seen to many horror stories on those...
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You know, it hurts to see a guy who has "it all" muscles-hair.......and then I look at me...and even “during” so-called relationships—have females who supposed to be with me..talk about and lust after these men!!! I can handle being alone...but not being able to even "like" myself has become destructive. I am back in therapy....but not sure they are going to be able to help me....
A horrible cycle of events!
Sorry if I went on a rant

Great advice from other posts!
I apologize for not really having sound advice...as I struggle too.