It seems Tribler is slowing down because no one is volunteering to be an exit node.
You do not have to be an exit node 100% of the time.
I volunteer twice a week for 5 to 10 hours each time.
I use a inexpensive VPN to hide my REAL IP.
If you wonder about VPNs, here is a website for more information; especially on VPNs that abide by a code of anonomity.
I use one of them.
If you want to take a real risk ( I would not) [but for cheaper VPNs]; go to stacksocial.com.
I do not know if this site is still in business but there are some VPNs that sell at deep discounts and a few of them promote P2P.
DO NOT USE servers in the USA, UK, France, Germany, Australia, Japan, China (Hong Kong is ok).
So lets SPEED UP Tribler.