I started to refuse ATC instructions after many screw ups on the line. These people bring you in too fast, too close to the airport, and sometimes too high. The electronics can not capture a glide slope from above, and the ACT approach controllers should be aware of that limitation. Pilots have to learn to say "NO" to these people when they screw up. Far better to extend the downwind leg than to try to salvage poor vectoring and end up dead.
A quick calculation one can do (if above the GS) is to add one to the ground speed for the rate of descent i.e. GS 150 kts, add one to the 15 and that becomes 1600 FPM. This gives you a 6 degree slope to capture the 3 degree glide slope. So: 140 = 1500, 150=1600, 160=1700 etc. Do NOT exceed 2000 fpm. Don't let them fly your airplane. That's not their job. Their job is to separate little dots on the screen.