This is normal to me, EVERY silver/gold mod box ive had on main acc had been silver, already passed 150 level a while back.
Every duct tape and polishing kit (25x each 5th level up) has resulted in non critical success in the armnoury (same happened during levels 101-125)
Everytime i take a chance and purchase anything i get the WPO (worst possible outcome)
that said my 2nd acc has had better luck, i opened up a recent shop offer where 1 pull got 8250 coins BUT once i did a 40 pull i got a rubbish 5& dupiclated non ascendable
that said, i can honestly say in my opinion looking at other players, accounts are handled differently, whereas someone would always get the worst in a pull someone always got the better side of it, this is why so many players in this community would state that getting benedicts was easy, getting ascend tokens was easy, having an abundance of knife sheafs was easy whereas someone else would have the exact opposite. i know most of it is RNG but it also favours certain players for sure