Reish Lokish was not a ger.
And what you write is not really true. Sure, some people will never respect a talmid chochm who’s a ger; no genuine talmid chochom would want their respect. Sure, some schools will not admit a ger’s children; those schools are far from the “best”. And sure some families will refuse to make shiduchim with a ger’s children; boruch Hashem for that, since it saves you wasting time with such unsuitable families.