I started tipping for a while, and I think I will stop unless I am being served sitting down. I see no benefit from the tipping, and the staff are not thankful

I started tipping for a while, and I think I will stop unless I am being served sitting down. I see no benefit from the tipping, and the staff are not thankful nor do they seem to notice. and in most cases they do not do anything at all to benefit the tips..