What is the problem with my internet connection?

Question

Computer networks

Good afternoon,
The Internet connection speed indicated by the provider in the offer is 100 Mb / s
Router THOMSON TWG870UG (used for 3 years, sometimes it messes up in terms of signal in another room, but by turning the antenna the signal returns to normal)
My problem: when viewing starts for example, a series from the site interny.tnt-online.ru/s04e58 ping jumps very strongly and, for example, playing a game like World of Tanks on another computer becomes impossible. Of course, at my speed, this connection is impossible, but I can’t figure out exactly what the problem is. At my home or at the provider.
The trace shows the following result (when playing WoT on one device and downloading the series from the site on another)
prntscr.com/6d89kw
Tracing on one device when downloading a series from the site produces the following results:
prntscr.com/6d896h
What's the problem?
Thanks in advance for your reply!

Answer 1

Of course the problem is WiFi.
Connect with wires.
And what's with the tracing?