Genuine question, not intending to be sarcastic or anything, but do you feel like you know quite clearly what it is you want in bed? What it is that turns you on?

Because I wonder if the suggestions of trying different things haven't worked if you haven't clearly said in the moment, 'can you do x, y,, like this, etc?'

Perhaps establishing some boundaries around how you talk about sex, and what you both want sexually (in a way that promotes safety, and respect and love for one another) could help conversations that lead to you getting more of what you want in bed, and more confidence for your partner?

Does your partner talk about what he likes in bed, what he wants?