What content are you showing?

What does 'normal' mean? Outside in the sun is normal. As is inside in the dark. Have you gotten a light meter and measured the light at the location you are using it at? That's critical to ensure proper light output.

Generally speaking, in a normally lit boardroom with florescent lighting, the projector should emit no less than 80 lumens per square foot of screen size. More typically being a bit better.

Pico projectors, occupy an entire class of chip as created by Texas Instruments. So, it can be a 10 lumen projector to beyond a 1,000 lumens of brightness.

A model like the P300 from AAXA Tech may be a better way to go if all you've tried is really cheap stuff (junk?) up to this point.

The Philips NeoPix is truly a piece of junk. No better than what is being offered for under $100 on Amazon.

This would be what I would call a minimum projector:
https://aaxatech.com/products/P300neo_pico_projector.html

Image size MUST be small though. This isn't a business class model with high brightness. You are also being super slim on details about your use case, which isn't helping give a great answer.