One thing to note when “trying everything” is that you may have to keep up with a technique for at least a few weeks in order to see any results. It sounds like you’re having some success with WILD. Whether you stay with that or try another technique, I would keep at it for a few weeks and see if you improve before moving on. For most people LD’ing takes practice 
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If you haven’t already, I would recommend reading How to Choose Your Technique. There may be a newer version of that post, but that’s the only one I can find.
The following link may also have some information that you haven’t run into yet 
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https://community.ld4all.com/t/all-ld-techniques/24932
Good Luck!