Well the source is one of a number that document violations of the Minsk agreement. You don't just need to read that one and it's from 8 years ago I just grabbed it to show how long Russia has been ignoring their related ceasefire agreements. I think the source is relatively neutral but you are right it may have some bias, it's about as neutral as English language sources come though.
I think this post may be off in interpreting or wording because Russia has had major violations of a number of treaties, notably recently the Minsk agreement but I think Zelensky is talking about 25 major violations not 25 separate agreements.
Regardless of all of that, Russia has a very long history of not honoring their truces and ceasefires and using them as a reprieve to beef up their military forces before continuing to fight.
Your French has been pardoned but fuck you too pal.