I have analyzed the MTR trace. You can see on one of the first hop that you are loosing a lot of packets. Over 2% is unacceptable. The first one where it appears is at 100%. This will create you unexpected connection issues with pretty much wherever you will go. Sometimes, they may be transparent because of the retry mode and such. But, in this case, those numbers are extremely high. Anything having Worst values in the hundreds is also another sign. The first one is your router or your ISP and it probably does not allow this ping MTR thing. But, later on, at 4.69.140.142, I would say this is where the problem is. This will affect everything on going.

Not sure how you will resolve that one. You may want to talk with your ISP. You may do the same tests from another point, such as the office, assuming you did that test from home. See if it uses the same route. If not, you will probably get some very interesting numbers.