2.5 is on the 'optimistic' side of things, but not unreasonable. I check the Climate Action Tracker (CAT) once or twice a year, I think they summarize current projections pretty well. Our current "policies & action" is around 2.7 or 2.8 degrees. Which would be really bad.
https://climateactiontracker.org/global/temperatures/
I'm not completely sure but I think the "1.5" number is regarding a long-term trend, not one portion of one year. We're at around 1.2 now according to the CAT thermometer (select Global -> The CAT Thermometer). You can look at specific countries like the USA as well.
Didn't mean to sound passive-aggressive, sorry if it came across that way. I just don't want people to throw their hands up in despair. We need to fight back, and know that fighting back works.