I have a global context filter but I don't want it on one worksheet but still want to use it as a global filter.

If you have applied the global filter then it will be throughout the workbook using that dataset and we can’t exclude some part of it. If you don’t want some of the worksheets to be included in that, you may use context filter and proceed. Remember context filter will be applied to that worksheet itself. You may extend this and select all the remaining or a few of the remaining worksheets as well.