How discouraging!
I’m equally averse to being tethered to tubing. If I were you, I’d stick it out a while longer in case I got used to it. Lantus/Humalog works really well for me but I am tired of the daily needle jabs! Down the road, you might consider a tubeless pump like Omnipod. Minimed is also currently developing a tubeless pump. As far as CGM, people do say the performance can vary from sensor to sensor, so try a few more sensors to see if it gets better. The sensor technologies used by different CGM systems are different and you may get better results from a different system.