No CPU will give your 1080p/144hz constantly. In general the 3600 will give you about 10% better fps in games over the 2600.
https://www.techpowerup.com/review/amd-ryzen-5-3600/15.html
That's not exactly accurate. Yes to the Ryzen 3600, no to the 144hz/fps constantly. It really is dependent on a number of factors.
There are a lot of demanding games and poorly optimized games that any CPU on the market today wont consistently hit 144hz.
will the ryzen 5 2600 be a bottleneck? if so should i buy the ryzen 5 3600 instead?
( want to play 1080p 144 hz consistent )