What do you do when your cat wants too much attention?

My cat want attention 24/7 and developed a habit of scratching me to get it, my neck and hands are full of scratch marks.

I'm patient and don't show aggression even though he makes me bleed but I have limits and I'm really tired of him.

I've watched tons of videos on YouTube, read advice from other cat owners, visited multiple vets, but nothing works.

What do you do when your cat wants too much attention?
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