hi
artefacts is no good .. maybe hardware problem if you didn't oc ,.. or maybe psu too weak ... but i did get artefacts too and had to rma the card ... didn't receive it back yet , but have a 6900xt now and have no issues for now ...
about performance you can try to raise minimum frequency in wattman, seem to solve a lot of fps issues lately (except for cyberpunk of course)
in fact i tested BFV too , not working very well with rt, i think ray tracing support in this game is poor (in fact i get good performance during firsts minutes than perfomance degrades... althought maybe there is updates since i tested it ..)