B1ad3 was never a decent player lol. He was like Hunden, high IQ but negative rated all his career, even when he was young. The only other halfway good player was markeloff. Markeloff was washed after 2012 (he got kicked from Navi later), and you're talking about 2015 flipside markeloff? Stop kidding yourself. Markeloff's prime ended with CS1.6, he literally didn't achieve anything in CSGo, even at Tier2.
If you disagree with this, then ZywOo too was playing with great players since late 2018 when he joined Vitality, with like 40 maps against Top30, 75 maps against Top50, etc. Even then, he wasn't even a contender for Top20. The same argument goes for s1mple. He never played T1 events with T1 teams till 2016. He was banned from many circuits till 2015 lol. He had 30 maps against Top30 in 2015, which was the 1st step into Tier2.
If anything, Coldzera had the most impressive debut run of all time. Joined LG in late 2015 (just like ZywOo joined Vita in late 2018), immediately became Top1 in 2016 and 2017 in a row. The difference being, he won Esports player of the year award, Major MVPs, Majors, tons of tournaments, had his own graffiti, etc. That's called "shredding" the scene.