We can check whats there for sure. I enjoy welding, so I don't mind at all.
In the shop's defense though, welding vertical welds and welding up-side-down (like you need to do for the control arm mounts) is tought to do. It takes a lot of practice to get it right. When I MIG welding like this, I normally use some "tip dip" to keep the nozel clean and add a little extra flux. Then, weld with 75%/25% CO2-Argon mix. You get more splatter then you do with pure argon, but you also get better penetration on the weld when welding with the mix. Final thing to do is prep the weld area CLEAN. When actually welding, since your working against gravity, lay down small 1.5" to 2" beads. If you try to weld much more then that you'll probably get the whole area too hot and the filler metal will fall out.