Impossible to find solid and thrustwurty exchanges ?

Hi, I’m quite new in the cryptomarket. Maybe someone experienced can help.
I’ve done som serious research on exchanges for buing, storing and withdrawal crypto. I find it almost impossible to find a solid and trustwurthy exchange without negative experiences from users. Especially withdrawal theses days. I use Trezor for storing, and evaluating Ledger Nano S as a second wallet, but its really hard to find exchanges to trust AND withdraw the crypto without problems with transactions. I have solutions for Bitcoin and Ethereum but altcoins is the main problem. Poloniex, Bittrex, and a really great number of other exchanges just get negative feedback nowadays and lots of users are screaming about the withdrawal problems.
Mostly I notice inputs like scams, keep out, dont use, Unserious, I cant get my money, no support, and so on.
Really frustrating. I just want to buy different altcoins at an exchange and transfer them to my hard wallet without any problems. I also want a wallet to store Golum GNT which I find diffucult. Even the MyEtherWallet system and Exodus desktop storage has negative feedback.
Any recommendation for solid exchanges with only positive experiences and feedback not holding you awake at night ?
Thank you for reading this post and Please advice
JT