Is 批判 or 批评 better in 别人总是批判我?
批判 is to criticize in a formal, comprehensive way. E.g. 对于传统文化我们要批判继承. (批评 isn't fit)

批评 is casual and specific. E.g. 老师总批评我上课不认真听课. (批判 isn't fit)

If those criticisms are casual, specific, and not that serious in your case, you should use 批评. I don't expect "how I'm praying, how I'm eating" deserves a comprehensive one. They might just criticize for your certain behavior and try to correct you. In this case, 批评(criticize)和指正(correct) are the words you could use.  

If you find those criticisms annoying, you could use 指手画脚, 评头论足, and etc.

P.S. Colloquially, you can say for your situation: 现在我觉得伊斯兰规矩太多了，经常有人说我这不对那不对的。(烦死了！)