How decentralised Bitcoin really is?

full image - Repost: How decentralised Bitcoin really is? (from Reddit.com, How decentralised Bitcoin really is?)

I often read on various cryptocurrency subreddits people talking about how Bitcoin is the only truly decentralised cryptocurrency, but after doing some brief research I find that 70% of the btc mining hashrate is shared between only 6 entities. (foundry USA 20.6%, AntPool 15%, F2Pool 15%, Binance Pool 11%, ViaBTC 10%, Poolin 9.6%).Am I missing something ?

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Mining:
Bitcoin, Cryptotab browser - Pi Network cloud PHONE MINING
Fone, cloud PHONE MINING cod. dhvd1dkx - Mintme, PC PHONE MINING

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Exchanges:
Coinbase.com - Stex.com - Probit.com

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Donations:
Done crypto