I think not, seeing how I was playing against gold/silver people when I was gold in comp. I barely played comp though, usually just did my placements at the end of a season and some extra games while the SR gains are still high, but mostly play QP and arcade otherwize. Anyway, season 4 I placed around 2400 in the last week of the season and barely made it to 2506 on the last day to get plat CP rewards. During season 5 I just played QP but noticed that I was coming up against more plat players, and eventually almost all diamond/ high plat players. When I did my placements at the end of season 5 I placed around 2630, way higher then my season high in season 4 despite people saying you're placed below your rank. I climbed to 2722 after playing 5 or so additional games and quit competitive. Yesterday I did my season 6 placements and placed 3010, despite going 6-4. It must be my QP MMR that plays a role. I did have loads of gold medals each game though, despite playing only tanks, same in season 5, so maybe that helped too. And my overbuff profile has pretty good stats too for my most played heroes (
https://www.overbuff.com/players/pc/ZaWarudo-2871) so it could be I just didn't play enough comp in the previous seasons to climb out of gold.